I have the same initial question but the location is Australia (Sydney) for a recent yacht purchase powered by T90. There is a supplier in England but hoping for someone closer. PS the link to "parts enquiry" is no longer active.
These are older Ford Fiesta diesel engines and we're marinized in England and never imported into NA so you'll be lucky to find parts in NA. Try the moody Owners Association as many original Moody's used these power plants