How to find the right plastic for a new product

I need plastic sheets 65 inches long and 12 inches wide. I don’t know how thick but here’s they key characteristic - it needs to be bendable into an arc, but thick/strong enough that it can support some weight (20lb?) with sagging greatly. I’m not sure where to turn to even explore this idea. Any leads greatly appreciated! I’m in Ohio and working with a company I could visit on site would be a plus. Thanks!

You might want to check out Sintra, essentially PVC in sheet form. It machines really well, and you can bend it if you apply some heat. I think it comes in 4’x8’ sheets, and shouldn’t be too hard to track down if you’re in or near a major city.