whipple was the only company that made a kit for the 3.0...and they have been out of production for a number of years. used kits can still be had, but at a premium.
im sure a 4.0 blower could be retrofitted with enough fab work...just depends on how much time/money you have (its not going to just bolt on).
super-chicken (t-bird) supers are a pretty common one to use for low boost (9 PSI).