UPDATE:::::::

Its X-Mas time / new years silly season, so there is no frikken way I'm finding a new thermostat at the 'mo. (believe me I've tried!!)

SO, I'll machine up a "HRC" type open thermostat out of alloy. The question of the day is..... What diameter should the open hole in the centre be? Does anyone have a pic of one??

Thanks again gents!
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........."I love the smell of 2-stoke in the morning.......Smells like victory"............

MC21 Pentax SP...... TYGA'D