Navigo here...
Navigo 3.5" Sat Nav V2 PLUS - UK Maps, Full Postcode Search - MP3 &MP4 player, Bluetooth and FM transmitter - Ebuyer
MemoryMap software here...
EVO Distribution Limited UK Maps | In the Air
You'll need some other files to get everything to work on the Navigo, I can email you those,
Working GPS for under £100.