In message <4452494e_2@mk-nntp-2.news.uk.tiscali.com>, G Cadman
<gary.cadman@NO_SPAMtiscali.co.uk> joss stops reading and ponders a
while before scribbling this reply

I did see some idle control valves for sale on Fleabay last week, under
the pug section. However I can not remember which models they covered
nor the quality of said item.
Of course Goggle is your friend here.

Both Neat and GSF want about £75 vat inc  for the 1800cc version on line but
don't list one for the 3L model.
You could try a phone call after the holiday perhaps.

Bob