Well, I don't know a much about Text::Reform, but, it seems like you could store the format in a file, and when you want to use it, just open the file and read the format.

You may also want to look at Perl6::Form. It impliments Perl6's formats which are very powerful. Unlike most Perl6 packages, it doesn't use source filters and is likely very suitable for production use. You will probably still have to read the format from the file.

Update

I wasn't thinking too well... Perl6::Form still requires you to intermix the format with the variables. I'll keep thinking!