Looking for 3 bolt exhaust flange / pipe (off old cats) or aftermarket part number

[jcw]

I am looking to see if anyone has any old catalytic converters with the 3 bolt pattern flange (see pic #1 circle) laying around that would be willing to cut off about 6 inches of pipe with the flange. I will pay for shipping and your time
Or if you happen to know of an aftermarket piece that will bolt up to that pattern. (pic #2). Im having a hard time finding one with the same pattern
I have a new aftermarket catalytic converter with the two mini cats and a triple bolt flange, and I am looking to customize the rest of the exhaust from there back. I want to bolt up (Not cut off and weld) that part of the exhaust

 

[Andy-WhiteTJ]

Look at Summit. https://www.summitracing.com/search/part-type/header-reducers

Plenty of choices.

 

[jcw]

Look at Summit. https://www.summitracing.com/search/part-type/header-reducers

Plenty of choices.

I've looked at every website. When I look at the bolt holes measurements (if provided in the Q/A section) none of them are the same as the size of the piece I have. I don't want to keep buying and returning items until I hopefully get what I want