try this company www.afefilters.com. They have all a filter you might be looking for. They are not cheap, but good filters. I was thinking about using one of their filters on my SC. I am looking to use them on my truck.
I recently ordered an S&B power stack 7" conical with inverted conical filter on the end from Bill Evanoff. Looks great and fits the MP cool air divider better than the 9" filter I was using.
Mine has a 4" inlet because I'm using a Pro-M 87mm bullet style MAF, but I'm sure he can also get the same filter with a 3.5" opening.