YS's can be had "quite reasonably" over here with the disappearance of glow - you just have to keep watch out - All of mine were "collected" at less than the $200USD price point.

I have reviewed the system and conversion all looks doable and there are no really complex soft parts - The diagpham is simple an could be made with the regular gas resistant material - The valve "head" is hard silicone but could also me made of a gas resistant plastic. the rest are o-rings with the exception a soft rubber seal on the throttle barrel which I presume seals back super charging pressure from its location.

Would have to determine how much "boost" is going on with the case supercharging to determine what fuel requirements might be - I did find one instance of a guy who converted one and it ran well but the needle valve was very finicky - they are both only open about 1 turn on glow. BUT - we know how to fix this.. There is a perfect spot in the short line from the regulator to the carb where the solenoid could reside...