A couple of people have said they're interested in sewing their own roll-up sides (or finding someone to do the sewing for them), so here are a few details to help those possible projects along.
The side panels zip to "zipper strips" that attach to the hardtop. The zipper strips are attached with aluminum clamp strips that bolt to the same holes as the hard side panels do. The zipper strips get sandwiched between the hardtop flange and the aluminum strip.
The zipper strips at the front and top overlap outside the roll-up panel, so when driving at speed water won't get forced into the front zipper, and excess water coming down off the roof won't go into the top zipper.
These next photos are detail views of the front zipper strip. There's velcro outside of the zipper to seal the zipper from weather getting in. In the right photo you can see the aluminum clamp strip that holds the zipper strip to the rear of the door surround. Also in this photo you can see the plastic retainer strip sewn into the bottom of the roll-up panel - the plastic slips under the retainer on the tub just like the factory soft top sides do.
The top zipper strip is basically the same as the front one.
In the back, the zipper strip is on the inside, because if it was on the outside like the front one, it would be facing forward to scoop up rain while on the road. So in the back, the roll-up panel butts up against the rear corner of the hardtop, and there's velcro followed by the zipper.
To keep the zipper strip from flapping in the breeze when the sides are rolled up, there are several velcro tabs to tie it back, these can be seen in the tall photo above.
There are 4 straps on each side to hold the side panel in the rolled-up position. The snaps are removable, they snap to the inside of the side panel. That way they can be removed when the side is rolled down, or they can be doubled back on themselves and snapped as shown at right. The aluminum clamp strip holding the top and back zipper strips in place can also be seen in these photos.
When rolled up, the 4 straps go around the outside of the rolled side panel and snap to hold it in place. Also, when rolled up the top zipper strip forms a bit of a rain guard over the rolled-up side, helping prevent water from dripping into the roll.
I posted a link a week or so ago to the window sewing method I used, so that plus this post is most of the detail one would need to sew their own set of roll-up side panels, but if anyone would like more info or see a photo of a specific detail let me know.
I hope this helps someone.