We followed this up with Jon. What he received did not work. If this is the way to go, Roland seems to be the source. I've found a couple of Fiestas in the wrecking yards, two missing something where the adapter would be. But do not know if the US version would work on our ZF.
Go to this link, scroll down quite a bit and you'll see what he used for his EFI converson - a VDO piece much like the Ford unit.
http://www.detomaso.nu/~thomast/efi/
Larry
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