Great stuff. The bass drum t-rods are almost impossible to come by and extremely expensive when they do. I'd get yourself something workable in the short term and keep your eyes peeled. I picked up a couple recently from a guy who had lots of old parts but that was a real wild card.
DW did a version of these but they have that irritating small, tight thread they do (if you can find them) and also hella expensive.
Your countryman Ronn Dunnett does a few "Camco-like" parts for his Geo. Way revival line - might be worth trying to touch bases with him as well (I'm thinking specifically floor tom mounts and legs).