Did you get the European model Sierra or Granada in the US as these came with the MT75 ?
The MT75 from the 2 litre DOHC Sierra, 2 litre DOHC Granada and 2.3 16 valve Granada should fit your block if you can find one in a breakers yard.

If you have to get one from the UK try Ebay but the carriage would be pricey to the US

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Mark