I don't get any results with search or stickies...do any TTS site sponsors carry one....GM Part Number...who sells the best aftermarket ones...is it an 'upgrade your membership gift'...not available on Rock Auto except for Delorians...can it be anodized...anyone got a wiring diagram....:hihi:
Sorry Simon, couldn't resist the opportunity to be the first one to ask the inevitable questions.:hello:
As to the ECM question at hand, I was able to locate a 98 ECM for 635's restoration on E-Bay so perhaps that or try Craig's List. If you get a score, then shipping can be worked out through a third party here (I volunteer) to help offset the additive costs applied by malevolent gvt. agencies.
A quick search on E-Bay this a.m. found them between $178 and $2300 (yea, twenty-three hundred.

[I can't make this stuff up] I'd post a link but that would really derail your thread).