Yes, Snowpeak ( as called in the U.S.) will build them to your specs if you meet the minimum order , and anyone can join in the fun. They will make them with with/out TI tube, reg, other.
I have seen only one example, low cost fast finish exterior ( okay, ugly cheap sthuff) the machining inside was very good actually and much better than one might think at the price point. And yes they are the famous B-3 springer people.
I believe the reason there are not more here is the dealer one would have to use in the States?