I once made one of Naugahyde with a pattern from a book I found in the Library. My mom had the couch recovered and the upholstery man gave me some brown scraps for free....I couldn't afford real leather .
The Naugahyde was easier to cut sew and lace than real leather...looked pretty good and held the gun. Mom put the snaps on it for me with a little tool she had , she could sew and make clothes and sometimes used snaps .
If Naugahyde is Vegan Approved you can find plenty of patterns on the inter net and make your own or contact some custom makers and see if they can help you out.