I have a Nurrish sat nav which cost quite a lot and was pretty adhoc (although worked), I've just spotted this: http://dx.com/p/7-0-lcd-windows-ce-5-0-mt3551-cpu-gps-navigator-with-usa-canada-maps-2gb-tf-card-51442 it's identical to the Nurrish sat nav, far better construction and fits into a modified cubby. By the ways it's about £75 with free delivery, the uk maps are free to download.