Fuel line shield to prevent vapor lock?

[Bobs29ModelA]

My '29 was in a St. Patrick's Day parade the other day, and it was warmer than usual. I had an unusual problem surface, that is, my car exhibited signs of vapor lock, which has never happened before. I've ruled-out any other possible fuel-delivery problems, and am now looking for a way to counter having any other slow-speed (crawling) parade issues in the coming summer months.

A member of our car club says this can be a common problem with fully-stock Model A's, and that he's seen at least one vendor out there that markets some type of small heat shield that clamps-on to the fuel line, to at least give it a little added protection from the nearby exhaust manifold. However, I've so far been unable to locate any such product out there.

Does anyone know of a vendor who sells something along these lines? Or, have any other ideas about how to shield the line from excess ambient temps during events such as parades?

I read that some people have slit a rubber fuel line and placed it over their metal fuel lines; I'm wondering how successful that simple approach might be?