First job is 4 6061 turned adapters. I'll provide the material: 4x 6"x1.75" 6061T6 (from onlinemetals.com).
Second is a pair of steel adapters, which are mirrored about their center plane. I don't have the material for this--they should be steel, 1018 or 1020.
Part files for all three parts are attached (I can save in other formats if you want), including drawings (none of these parts have particularly tight tolerances expect for the 10* taper on the spindle). Speaking of which, I have a 10* taper reamer I can send if it would make things easier--1/2" shank.
These are one-offs, so I probably won't be ordering any more in the future. Also, I don't mind using two shops if you only want to quote one of the jobs. Send me a PM, thanks!
Job awarded, thanks everyone.