"I checked with VTL today and they never put InfiniCaps in the stnadard MB-450's. They only do it as a special mod. The standard is the MIT MultiCaps."That sounds right, however, I believe if you go back far enough, even the MultiCaps were an optional upgrade, but I don't know the time frame on this.
Bruce: Michael Percy is a well-known parts-seller in the industry. He is not a tech for hire as far as I know, but I suppose he may be able to recommend someone fairly local to you.
Your question about remote turn-on, whether via the soft-start modules or not, is one you'll probably have to ask VTL.