NorthernWoodsman
Adventurer/tinkerer
I'm really set on fiberglass for a variety of reasons including maintenance and noise, but primarily fit. It matches all of the bevels and angles of the cab rather than the "close enough" you get with a giant sheet of metal folded in thirds. There is a company that makes an aluminum cap that will fit so I have that option but really don't want it for the above mentioned reason. That and from what I've read, the fiberglass is lighter.
fiberglass lighter than aluminum? haven't heard that before. having owned both i can say that from my experience an aluminum canopy is going to be a lot lighter than any fiberglass one. again, from my experience.
i think that if gemtop made you a canopy specifically for your truck they could match the angles of the truck pretty close. but, like i said before, it'll be expensive.
i still think your best bet is craigslist. usually you can find canopies for that style truck from ~$100-200 depending on condition.
best of luck to you.