I custom cut the material for my '37. As I recall I couldn't find a ready made floor covering. I don't know if even now one is available. I made a template using grocery bag paper taped as needed to get the size needed and then used a razor knife, the ultra thin and pointed type some wood carvers use for fine detailed work, to mark openings for the tranny, foot pedals etc. Once I was satisfied with the template, that pattern was transferred to the material. As I recall, it took a couple of efforts to get the template correct. The final material used was thin carpet, foil heat shield and a rubber matt material. This was some 10+ years ago and the materials have withstood the time test. But, the materials used are acknowledged as incorrect for points judged vehicle. Regardless, I'll be using a similar process for my '46 project.