How many times did that car go to the mechanic? Jesus I would have just fixed everything in one shot at home with a beer in hand.. I'm too damn cheap I guess.
Which valve do you have? If it's what you say, the rse then you can chop off the barrel on the plate to make it completely flat, you can then mount a normal intake (offset is better for this) to the face of it with the normal intake studs (though longer ones for the extra hardware.) Put a gasket between the 2 and may require slight modding of the intake to get it to fit aside the reed assembly bolts near the barrel.
I have found it really easy to use plastic bottles like those for Tylenol and cut them into very precise strips that are solid and slightly compressible as an adaption to an intake from a carb that didn't fit or have an adapter. I also happened to have a very perfect sized almost empty 10 year old bottle of dried out screw medic, it was a snug fit just into the carb clamp so I had a solid absolute seal preformed for me something like a decade ago.
I think if you have semi useless odds and ends you can make for a very decent seal if you go towards making something. I don't think I even needed sealant on that one, did have a lipped gasket in the butt of the carb connection so the standard 18-19 whatever mm sized intake rested further in the carb than the shim, that compression fit would probably be key to success regardless of the seal of the shim. If you have an appropriate o-ring seated then as long as the intake is smooth then it should result in a complete seal. The polypropylene plastic of those pill containers is gas proof, easy to cut, flexible, and easy to aquire.
