I got a VBand O2 off ebay.
When it came the said SSAC on box. Look to be good welds. $90.
Its flanged for Tial 46 and 3" VBand.
I'm going to get a 3" downpipe, cut off the stock flang and weld on VBand.
Having trouble finding a cheap 3" though, largest I can find is 2.75" so far.