12 bolt brake hose t-fitting--HELP needed a.s.a.p.

[VintageMusclecar]

In a futile attempt to get the rear brake system together on my Chevelle's 12 bolt, I have ran head-first into a rather surreal roadblock. Frustration levels are rather high at the moment, so forgive me if I ramble...

I have 2 different "t-fittings" for the rear brake flex hose; an original 10-bolt style that has the correct inlet and outlet thread sizes, but lacks the small drilled boss to bolt the fitting to the correct 12 bolt brake hose bracket, and the other which looks like a correct 12 bolt style fitting and has the correct drilled mounting boss and outlet thread sizes, but has an incorrect 3/8-24 inlet thread size instead of the required 7/16-24 where the flex hose attaches.

I've already tried OPG, Chevrolet Restoration World, and Ground up--none of them show the correct 12 bolt t-fitting, all they show is the 10-bolt fitting. I've already scoured the Dorman drawers as well as the Dorman catalog at my local NAPA. No correct t-fitting, nor could I even find a suitable adapter to go from the 3/8-24 (male) to the 7/16-24 (female) with the correct conical sealing ends so I could use the fitting I already have that has the required drilled mounting boss.

(Assuming such an animal even exists), I need to find a 12-bolt t-fitting that has the drilled mounting boss AND the correct 7/16-24 inlet threads for the flex hose.

HELP?!?

Eric