Making those pieces would be a piece of cake for just about anyone with a lathe. The cup i.d. is the o.d. of the starter snout. The o.d. of the cup is already machined into the scattershield (look, you'll see it). The other part is lust a piece of rad welded to some flat bar - instead of turning down a larger piece of rod you could just put a sleeve over the thinner piece.

I'll take a look, the only piece I bought the kit for was the cup. If I can find it I'll measure up the other part. Hell, maybe I'll just make these kits up !!