I'd be calling Bob Serva and asking for something more firm. I've had a Fusion gun and dealt directly with Bob.
Of course, sometimes, custom builds can take more time than expected. I've had a revolver being built for my wife for two years now, but, in the 'smith's defense, I told him to take his time with it, no rush. I got the frame, cyl, etc from him a couple of months ago to send to be hard chromed. Mahovsky's told me 30 days, they called today (two months later) to tell me it was done and being shipped back. I had a gun with a 'smith being tricked out and he had a death in the family and a couple of accompanying issues that set things back quite a bit, it sucks for everyone but what are you going to do. Bob is a good guy, Fusion is a good company, speak directly to Bob and hold him to what he tells you.