The issue might be finding a place that will print the image on the vinyl if they have concerns about copyright. Also finding a free image that is high enough resolution might be tough. I have seen some very nice photo backgrounds though - I do like the depth they give the enclosure.
Several people here on the forum have been to Madagascar - maybe one has a photo they would be willing to let you use? I've gone through my Peru pictures - wrong continent, but we went through a ton of forest. Lots of pictures of ruins, but nothing suitably "junglelike".[/QU
Those are cool, but it looks like they have a different site for US customers, and the cheapest option they have is still $290...quite a bit more than I had in mind! I thought about making my own background out of Great Stuff foam, etc., but I prefer the look of a rain forest/jungle photo instead, not to mention the other benefits like easier to clean, easier to install, etc.
Finding a high resolution photo seems to be the first hurdle. Even the computer wallpapers that are free to use from National Geographic aren't that big.
Another cost effective idea to consider...there are all sorts of "landscape wall murals" of many different types of forest scenes available online, and though they might be larger than the cage, you could find one that has enough detailed imagery that you could cut a nice tree/foliage section out of, get it laminated, and use that on your cage. When I set up my melleri free range room I put these murals on the walls. Only problem was that one of the melleri was determined to reach the trees. I'd find him far up at the tip of a branch close to the wall, reaching out over and over. Also, there are several "forest" design printed camo fabrics too. I used one to make curtains for my bird aviary to regulate the daylength in summer.