GVS,
Fred Gimbel, Autovision, is an expert on the various E-Ms; he probably has built as many as anyone (including mine) and could probably give you the info you'd want:
services
My E-M has a body from Power Performance - installed and finished by Fred - it is exact to the earlier E-M specs. Their web site is:
Power Performance
There's a phone number at the bottom but the web site appears empty, so I don't have any idea whether they're still active.
Hope this helps...
Tom