Update: If you are planning to replace panels once the sun deteriorates the UV, these Greenhouse Megastore panels do fit (6mm, 8mm vs 4mm thickness).
The 8mm will be a tight fit into the roof channel (you will likely need to pinch the edges much like you had to do when you put together the door panels).
The 6mm would fit better for replacement roof panels. The 8mm thickness fits just fine for the walls and no problem getting the clips in place.
These come pre-cut at 2'x6', which are slightly larger than the HFGH roof panels so you will have to cut them to fit.
https://www.greenhousemegastor...
To replace the wall panels, you will have to order the larger size and cut down.
https://www.greenhousemegastor...
We are only replacing a few at a time and mainly for temperature control. I'm thinking that we can replace the West wall panels and take the old ones and double them on top of the back side panels. That way, we are only spending the money to replace half of the panels while still getting use out of the original panels.
At any rate, we are not doing this immediately. I'll take photos when we get these 3 sample replacement panels installed.
