Just thought id post this to save other scoobynetters a few quid.

I've been wanting to move my geodesy into the dash so needed to buy the re-radiating antenna. On the sites that sell the Geodesy units they are £75. I shopped around and got one from GPS warehouse (dont have the link handy at home - was at work, but a quick search should find it).

This unit is £45inc vat and £2.50 next day delivery. Does exactly the same and works a treat. Says it re-radiates upto 45cm and it seems to even get through the plastic dash from underneath the geodesy.

So im a happy chappy!