There is a place in Guadalajara you might try. It was recommeneded by Office Depot to fix a problem with my HP printer. They seem to have a lot of parts for computers and they seem to have a rather large supply. They also appear to be very competent. They might have or could get the power supply you wish. I have no idea if anyone there speaks English.
Phones: 3616-9222 y 3616-9223, Fax: 3616-9325 y 3616-3255
I think these phone and fax numbers are the ones before the area codes were changed. I believe you might have to add 33 before the listed numbers. Hope this helps or gives you a starting point.
(This post was edited by Don on Mar 18, 2003, 7:22 AM)