anyone know of any good affordable ones?

I've bought Britek lights from www.Skaeser.com before. (as well as other goodies).

They have a wide variety of packages available, in their Continuous Lighting (http://www.skaeser.com/continuous_lt_kits_list.html) section.

:)

If it's a case of no money, you might want to look here

no budget lighting (http://cgi.ebay.co.uk/BUILD-PRODUCTION-STUDIO-LIGHTS-Arri-Mole-Kino-flo-Light_W0QQitemZ7556246046QQcategoryZ3319QQssPageNa meZWD2VQQrdZ1QQcmdZViewItem)

Kino's are my favorite lighting system and they're relatively easy to build.

Of course a kino-flo make them professionally and their stuff is always worth looking out for.

You might also want to check out Tom's Hardware, a website that has palns for building almost anything