Update
I wanted to update this for those who might be interested in buying a flippac from FRP.
I had the pleasure of meeting Diana, Homer and some FRP employees on Saturday when they installed my flippac. They were all genuinely nice people and the product is exactly what I wanted. To my eye it looks all high quality, the fit and finish is nice, it works great. I only wish I had known about the flippac when I first bought my truck and I wouldn‘t have bothered with even looking at, let alone building, my own slide in pop up camper.
FRP bent over backwards for me. They were a couple weeks behind schedule but made a real effort to have mine done when I was able to come pick it up. They install on Saturdays for people from far out of town and although technically closed on Saturday it seems like there was a lot of activity the day I was there. It took about 4 hours to have the flippac installed and they work in the back of their building so you can't see what they are doing. It doesn't seem that the basic installation would take that long so maybe they do some of the final assembly at the installation. Communication with them prior to installation sometimes seemed uncertain and sometimes frustrating but in the end their often maligned customer service proved excellent.
A few observations:
The order form lists a “date promised” which for mine was 13-14 weeks, I was able to pick it up a couple days short of 16weeks from the order time. Not bad at all, my problem was that I needed a definite date for installation of at least 8 weeks prior to the install so I could take time off work to have it done. I allowed a couple extra weeks, the delay caused some difficulty but FRP came through with flying colors in the end.
Diana and/or Homer mentioned that they are manufacturers and not primarily retailers and the flippac isn‘t their only or even their main product, although they seem happy to be making and selling it. At the time of order Diana even mentioned buying from a dealer but there aren't any in the Washington, Oregon area. They certainly don't appear to be trying to siphon away sales from their dealers, if anything they seemed to me to prefer dealer sales. The inference was that it may not be a typical retail service experience.
There is no additional charge for installation at the factory, they used typical foam sealant tape but did a nice job of installation and in very heavy rain and winds and travel at highway speeds there were no leaks in the flippac or the attachment on the truck rails.
I didn't ask questions about things not related to my order but I was around the office most of the time and in casual conversation the following came up or was implied:
It seemed to me that FRP charges retail customers the same amount as they charge their dealers, the dealers mark up the price and provide more of a retail experience/customer service and warranty.
If I understood what I was told correctly, FRP doesn't make any modifications of their basic product for dealers. If you order a flippac without windows from FRP they charge the same as for a flippac with windows but apply a thicker “spray” (their term not mine, maybe it is sprayed fiberglass rather than fabric). Dealers that order the product without windows therefore get the thicker walls so if they add windows then you get a product with thicker walls than if you ordered a flippac from FRP with the windows. I didn't know this when I ordered but I doubt if I would have ordered one without windows or even have asked to have the thicker walls and pay extra for the windows. But that might be a consideration for others.