Pretty hard to find parts, eh?

Wish I could help, but just had to say, that's my old kit almost to a "T", but mine had 2 mounted toms. Oddly it had 2 separate tom mounts.

My kit should have the goofy bracket that mounts on the bass hoop. It would be cool to have it but if I did I dont know if I would play the drums with it. It looks to be sort of shakey in the pics I have seen but heck who knows, it could have worked just fine.

Just got a closer look at the pic, your kit is def older than my was although Kent's were never extremely consistent.