Mate,

Any switch will do from jaycar etc so long as it fits - just rate it to 250V 20A - more than enough power rating than youd ever need

As Gavin stated -

In addition - Pinball Resource has NOS GTB switches, but your best bet might be MarkC as he has a parted out Jurassic Park.

Thanks guys...I'll have a look re Jaycar, although I've got a sonarplus catalogue at home now, which seem to be a bit cheaper.  Just wanted to make sure the right specs..If Mark comes on here later I'll ask him too....

Dont really want to leave another blood trail to the powerpoint!