I don't have pics but I have built them in the past.
For screen, I cut a pvc pipe into quarters along the length to make strips that would hug the frame. Then I screwed these strips to the frame with the screen sandwiched between. The problem then is the gap around the door. For the doors I simply drilled out a few of large holes one at the top of each end of the the door and frame and the same at the bottom immediately below them. I then dropped 4" long bolts into the holes. This way if 2 are in place the door is secure. If 2 are removed the door swings like it is on hinges and if 2 more are removed the whole door comes off. removal is fast and easy- just slide the bolts out to remove. In the end I hated the gaps around the doors though, so I stopped using these cages.
I may have come up with a solution to the problem, but I never used it on a pvc framed enclosure. But one time I made wood framed cages with pvc doors- I cut pvc along the lengths about 60%- so roughly strips of 40% (maybe 45) were removed from the pipes which were then attached around the door frame so the gaps faced the front. Then the actual doors which were made of pvc covered in screen held in place by the strips as described above are held by snapping the doors into gap stripped frame described. It works OK- holds very well with strength so even medium lizards like bearded dragons or blue tongue skinks cannot snap out, yet easy enough for a human to snap open and either remove the door or one end can remain snapped in and the door swings like it's on a hinge. I made a stack of enclosures this way that I still use sometimes when I need cages in a pinch. The reason I don't always use this stack is because the result cannot be taken outdoors for the summer- I keep all my lizards outdoors every summer all summer long. It was built for indoor use only, and there are still a few small gaps at each corner of the door frame. Never figured a way to insect proof the corners of the doors...
And finally I've made cages like the first but instead of covering in screen I just zip-tied rubber coated or plastic hardware cloth to the frames. I eventually stopped using these also, mainly because I dislike this kind of caging for insect eating lizards because it doesn't keep feeders in and fireflies out. And for really big cages like the 8x8 cubes I make for my iguanas I still prefer to use cheaper wood framing.
Oh and also I've made lots of my own reptarium frames out of 1" pvc and then bought replacement covers to put over the frames. It's cheaper and much stronger than the reptarium kits. I zip tied a strong water proof flooring material (the stuff they use for fast food bathroom walls sometimes) to the base of the frame and the result is so strong I can stack the cages indoors while using things like cinderblocks and large rocks in the reptariums for them to climb on.
I've also used this method to combine reptariums- 2 175 gallon reptariums can each have a side cut out and be slid over a 5' long x 4' high x 29" wide pvc frame and then sewn together with a hooked needle and fishing line to make a very roomy and relatively inexpensive enclosure (less than $100).
to attach plexi to your frame you should be able to just silicone it to the frame...