tbh the largest reptibreeze is adequate space for most of the common cham species in the uk (yemens and panthers). What chameleon is going in the cage and what sex? I have heard great thigs about the terry thatcher cages but they are a lot of money
Have a look at protean cages, or check out cages by design
Better yet, you may find there are folks local to you who ARE good with woodworking who could make a cage (solid sided or screen on wood frame or combo) for you to your specifications. Perhaps you have a skill you could barter/trade