Hi the original fan is a ebm papst type 612 ngml. 12v dc .75 watts. they are avaialable from
UK / European Head Office
Weycroft Avenue, Millwey Rise Industrial Estate, Axminster, EX13 5HU
By Phone: +44 (0)1297 529 242
By Fax: +44(0)1297 529 241
.
or you can order from maplin for less then a tenner. their part number FN6b .
regards
Abby