There's a preliminary packaging of fvwm95 in ftp.sedona.com:/pub/linux/debian.
It works fine, but currently conflicts with the standard fvwm and fvwm2. Perhaps you'd be willing to download my copy as a starting point and take over maintenance of the package? You can find information on registering as a debian developer at <http://sgk.phast.umass.edu/FAQ/debian-faq-14.html#ss14.1>. Let me know if you have any questions, and I'll do my best to help you get started.