The 91 is Bosch Motronic, I believe. I have a good used Jetroni engine out of a 1988 Veloce with 91,000 miles, just for what it is worth. I drove it for 2 years and the only problem with it is it needs a new rear main seal. Since it is out, I would replace the front and rear seals and install a new pan gasket set (it has double bottomed oil pan). I want $700.00 and can pallet ship it, but I would have to get shipping estimate, just in case you can't find something closer to your specification.
yes i have one a 1993 spider veloce engine with 45000 miles,
motronic engine as seen in the picture,EXHAUST manifold not included,
sold as is $1000 plus shipping ,i never drove the car it was damaged,
i have proof with mileage on a salvage title from texas,