Hey - I'm up in northern indiana.
Definitely can provide a set of stock 6.1 manifolds and oem midpipes.
I'm not sure if your $100 is the price you're looking to pay or just a placeholder but the pricing out there is Srt8 6.1 oem cats intact (midpipes) are worth $610-625 alone and then the headers $150ish.
I'm happy to sell a set of oem midpipes with converters and 6.1 manifolds to you for $775 picked up if you get in touch but that's honestly the best I could do just having you meet the simpler drop off sale price for a 20min converter guy delivery. I'd much rather sell the oem midpipes to a fellow hemi guy than have my converter processor just melt them down but you gotta meet the same price they'll pay for them.
Another option for you is aftermarket high flow cats (or used high flow cats) which will be much cheaper but might need to be tuned for which costs more $ possibly defeating the $ saving purpose