There has been an ongoing discussion on the Team Omni Mailing List about the possible reproduction of the factory 2.2L supercharger setup.
Here is a blurb about it:
So anyone interesting in purchasing a new supercharger for their 2.2 better get on board!!!!!!2.2 supercharger to return? (March 07 2007, 04 PM)
The original manufacturer of the Mopar Performance 2.2 liter engine supercharger - for carbureted 2.2s - was recently purchased by Atkins Rotary, which is considering reissuing the component if they can get 15 buyers. Serious buyers should contact Andy at 253-588-2350.