but I need a project to work on with Perl in order to keep up my interest in it

Just look around Trag. There are opportunities everywhere! Think of a problem that needs a solution and write some code to solve it. Grab e broken module from CPAN and fix it. (Make sure you let the author know you fixed it)

If you download something from Source Forge most projects have a TODO file in them with a list of things that need doing. Jump in.

I can't do work on CGI, as my ISP doesn't allow you to run webservers, which limits my options somewhat.

Nowadays I wouldn't accept an answer like that from an ISP. I'd take my business elsewhere. Vote with your wallet and find a new provider. (just my opinion and advise of course) There are plenty of ISPs that are inexpensive, allow CGI and some even provide MySQL or other database access. If your current provider isn't answering your needs (and it sounds like your current one is not) then I'd move on.

Specific project?

You really want a project? Here's one that will require some research on your part: a recipe database program that calculates dietary information based on the ingredients. That would be a good candidate for a project to put up on Source Forge and if you don't do it I am likely to in the future...