Example 1: Norm's Coupe
Example 2: How-to article on a F*&d website
I decided to convert. The filter I used is a Carquest #88179 for anyone that has a similar type filter housing. It seems to seal quite nicely at the top and the bottom when the wingnut is tightened. Looks pretty darn close to original to me.
Finished product complete with original manufacturer instruction decals: