roof panels / sheets (Reddish SK5)

Hi everyone. I'm on a very very very tight budget, and looking for some roofing panels or sheet or anything really that I can use for a watertight roof (4m x 2.5m) for a shed I'm in the process of making. Any offers very welcome. Thank you in advance. Ideally I'd want clear corrugated roofing but obviously I'm willing to accept almost anything that can do the job but thought I'd specify my preference just on the off chance someone may have that going spare. Thank you for reading!