[C320-list] Perkins M30 Thermostat Part Number and Source?

[Christian]

Having a difficult time finding a source to purchase a thermostat for a
Perkins M30.  Any leads?  Also, unsure if I have the part number correct, I
think its 145206022.

I see is sold in a kit at TA Diesel,
http://www.tadiesels.com/perkins-M20-M30-ck.html The kit also lists a
thermostat spring in that kit.  Is that something I would need to replace
when I replace my thermostat?  Just sent TA Diesel an email inquiring if
the thermostat is available outside of the kit.

Having an overheating problem.  Getting water flow out of the exhaust.  New
impeller.  Exchanger is free of any impeller debris, and impeller is not
corroded.  I suspect I should also consider replacing the mixing elbow as
it's original (and in process of ordering that).  But I suspect the
thermostat too.

Thanks,
Christian Caperton
1994 C320 "Canuck" #138
Monroe Harbor, Chicago, IL