I've got the same mouse
Got it fromGPS Warehouse, cost me £103.99 including shipping IIRC
It's a great little mouse, gets a fix within a few seconds!
Going to include GPS in MK4 of my Carpc.
Looked at Terran Brown's site and he's using the Royaltek USB Sapphire GPS Mouse - but can't find how much and where to buy it.
Please give your setup details, where to buy from, how much and also pro/cons.