That thing is nice! I like black number plates. Where did u find fmf expansion chamber? I only was able to find pro circuit. Wheels are also where nice. Not a cheap package. Good job!
I'm not sure you'll find a new one unless you just get lucky with someone who may have a newold stock laying around. If you have a decent calendar or can find a good used one you can send it to millennium technologies like I did. They can resurface the cylinder and you can buy the matched piston from them as well.