Gear Selector Switch

Does anybody know if there is anywhere that sells a repair kit for the gear selector switch for a P38? Was having problems getting it into Park or Neutral so decided to have a gander at the selector switch as I read that they could get full of water and gunk etc. Took it off this morning and it was packed solid with ice and there is a plastic cog thing inside and one of the teeth has broken off (hope that makes sense) everything else is fine so dont really want to have to spend nearly £300 just to get the plastic bit fixed!!
Any help would be much appreciated, going nowhere without the Rangey :doh:

You could try a breaker (Emmotts of Colne)or maybe P39 Ireland could help, I think he has swapped out a duff gearbox.

Ok thanks, theres a breaker just down the road from me so mite go see what he's got lying around, if that fails then will try P38 Ireland! Cheers muchly!