The FWAVE FPV1096SLN is a rollable solar panel with a peak output of 92W. It was available for around 50 € or $. Unfortunately it's bit hard to find nowadays. They seem to be not manufactured anymore and there is no replacement (yet). Too bad.
[I've got quite a few people ask me where to get those panels. The answer is: I don't know. Try eBay - sometimes a few pop up there. If you know where else to get them or if similar panels are manufactured again, please let me know! I'll put a link here.]