click on the RB Racing link in my sig, they may be able to help you out and they are in the Lansing area.
I have their agg. dune port and it hauls the mail.....
Of the different gaskets I've used (OEM, Tusk, Vito's) the Athena's were the only ones that I'd NEVER use again----------> poor quality and they leaked (junk).
Bob at RB Racing = TOP NOTCH!!
He's in the Lansing area. Little bit of a drive from Grand Haven, but his prices (and quality) can NOT be beat,
Click on the link in my signature below for his contact info.
I recently got the Uni pods from RMATV and am very happy with them. Even though they are single stage, they are a high quality filter. I run Outerwears on mine.
If you are in Michigan, I highly recommend RB Racing. I have used them several times and the service, quality, and price can't be beat!! link------> RB Racing web site