You can't rush these things Chilly.
Even if everyone else agrees, someone would have to enact the changes. Padders has exams and isn't here very much at the moment, Mythinglink and Neo are busy people too.
The best way to get a new forum in the past has been to prove it is required. So, go out and start some new threads. There are at least 20 Gerry Anderson shows, and we have about 3 or 4 threads here. That would be my suggestion.
I can't divulge what other mods say in private, but I know that Padders has said before that he is adverse to starting new forums for shows that are no longer in production. They tend to be very quiet.