Looking for headers for Indy EZ-1

I seem to be hitting a roadblock. Does anyone make a step header ( 2" - 2 1/8" ) for the stock exhaust port location style heads. It looks like you have to go with Victors or 440-1 to get into the step headers. I understand I could have them custom made but for financial reasons I would like to find a factory set. Car is a '66 Coronet with 500 inch RB. Any help with part numbers would be appreciated, or any other advice on where to look. I built a set for the wife's '66 Barracuda with a big block, but would rather not go down that path again.

Does this help only the a body needs to use tubular k it says TTI . John

It looks like the low deck style may be the way to go. Thanks for the reply. Is there anything else out there?