Actually, the only currently available correct reproduction tire would be a F70 14 Goodyear Wide Tread. (not polyglas) The current version of the Firestone Wide Oval repros are correct only for 70-up, and they don't repop any Uniroyal Tiger Paws at all. You can order the F70 Wide Treads from Kelsey for 160.00 each. Here's a photo on their website, kelseytire.com that shows what they look like.
repro F70 Wide Tread tire