Collector / Y Pipe flanges

[Grench]

I'm in the process of putting together parts for my SC install. I'm planning to have a custom exhaust done from the stock manifolds back - including the Y connector.

I'm wanting to save my old stock Y pipe as a spare part for my other truck, so if I can avoid cutting it up all the better.

So... Does anyone have a source for the flanges that live on the front end of the Y pipe? From what I can tell, they are 2 of the same flange.

I would like to go stainless ~ 3/8" thick for the flanges.

My initial plan is to weld from those to a 2:1 collector to 2.5" pipe then O2 sensor 1, cat, O2 sensor 2, over frame rail, muffler(s) and then out.

The snag in the plan right now looks like having to either harvest the flanges off of the existing exhaust or from a rig being parted out or have a set made.

I searched a bit, but I didn't see where anyone was making/selling just the Y pipe front flanges. I sourced the O2 sensor bungs (flanges) from Slee.

Thoughts?