Unfortunately I don't have any pics, but I installed lexan into my stock steel hatch. The lexan is about 1/2 the weight of the glass, and without it, the steel one really isn't too heavy or awkward. I took it off the car and set it on a card table. I bought the lexan from Home Depot. Their stuff is pretty thin, something like .095", but IMO just about any thickness will require additional bracing. I used 90 deg angle alumuinum stock (.125"x.25"), also from there. I'd have reservations about using lexan on a street vehicle
I also bought some 1/4 thick plexiglass, cut it into strips with my angle grinder, and sandwiched it between the lexan and lip of the hatch to help bring it up towards the surface. I was surprised how much more time consuming this was, probably 10 hrs completed, but the end result was worth it.
On a side note, lexan seems to scratch easier than plexiglass, but it is much more resistant to cracking, even over the high impact stuff that Home Depot has sold in the past. It's not cheap though either, I seem to remember the sheet costing something around $75. I also found that it's very easy to bend into shapes without braking as well.