Wood Conservatories Can Anyone Tell Me Where I Can View Upvc Standard Sections?

Can anyone tell me where I can view Upvc standard sections? - wood conservatories

The bottom 18 "under my garage door is rotted. I could cut little lazy and" graft "a piece of wood in place, but end up having to rot away over time.

I had the idea that some bulimia, (things that the windows and porches), but find no information about the size of the range of standard profiles.

Ideally, I need 70mm x 70mm with sharp edges. It would be better if it tubular (a drain).

Is this possible?

Does anyone know a website where this information is available?