you might want to look at that new sword for classics prime/City Commander its basically a much improved design that should still work with GFC/Omega prime
No kidding. I remember making the decision way back when to get Brave Maximus instead of the set. I have little doubt I made the right choice, but with aftermarket prices being even worse and there being not that many... Anyway, sorry to say that outside of a repro/KO, you're not going to find it. Those who have it aren't going to be eager to part with them without selling the whole shebang.
Transrepro might have what you want the GFC sword was basically Grand maximus's sword so it should work fine Link
transrepro is long out of commission, read the news section....i really wish they would just take the site down because some of the stuff on there still tempts me now . the owner, ken, suffered a stroke and there was a huge fiasco with bad deals, etc.... this is the one you are looking for by toystar: Transformers 20th anniversary Mp-1 PLUS-01 GOD SWORD S - eBay (item 270451851831 end time Oct-03-09 23:21:54 PDT) that price is as good as it gets and i would snatch these up fast, these KOs were from a very long time and there aren't going to be anymore that are so accurate and made from high quality ABS plastic. the TAW sword was kind of cool on the henkei prime but yeah the price was so high