All possibilities guys. Will also investigate any electronics firms in the area who may be able to salvage the existing switch. Will drop Holztechnik a line as well on the off chance they have something. The front with a new back is also a good possibility.

Hope this isn't the first of the electrical gremlins as she's just refused to start a good few times with lots of clicking and a lot of whirring from the back but no turnover! I sometimes wonder if I was mad taking this on but then I drive her and remember why I did!