Performance chip?

I have a 98 Dodge G. Caravan with a 3.8. Wondering if someone knows where to get a performance chip or programer? :confused:

No chips in these cars, PCM must be reflashed/reprogrammed, but I am clueless as to where to go for that item.

http://cgi.ebay.com/ebaymotors/PERFORMANCE-CHIP-PLYMOUTH-VOYAGER-GAS-SAVER_W0QQcmdZViewItemQQ_trkparmsZ72Q3a570Q7c66Q3a 2Q7c65Q3a12Q7c39Q3a1Q7c240Q3a1318Q7c301Q3a1Q7c293Q 3a1Q7c294Q3a50QQ_trksidZp3286Q2ec0Q2em14QQhashZite m260377149301QQitemZ260377149301QQptZMotorsQ5fCarQ 5fTruckQ5fPartsQ5fAccessories
only link i could find again