Thomas Knight of Thomas Knight Turbos (TKT) sells supercharger kits ranging from $2,999 to $3,999 (US$) for the 2.5L V6 KL-03. His products lack the quality desired by many V6 owners though.
I can't recall the website off the top of my head, but search Yahoo for him & his site.
93 Probe GT - for sale! $5,300.
95 Probe GT - the 007 version - smooth and refined.