For Airbus stuff, I use Air Cost Control. Good folks and fair prices. Not sure if they also support Boeing parts.
For instance, I used EN2714_013 lightweight shielded cable for all the CANbus wiring on my 8 and sourced it from ACC. Encountered EN2714_013 on an Airbus program and really like it. Spiral shield (not as "good" as braid) is SO much easier to work with than M27500, and the cable is smaller. Worked great.
I think I did have ACC quote me some of the ABS1339 clamps and, ehhm, took the traditional Adel path....
N164WM RV-6A Slider/O-360/FP Sold 4/2022
N184WM (RV-8) Flying. Titan IOX-370/ CS/G3X
N184P reserved (RV-8QB) Empennage kit and QB wings in the shop