Daz I got something for sale that would be perfect for you



This goes in place of your original bottom pulley



and this bolts on to the block above it, then the sensor picks up the 32-1 teeth

You would need to get a Sierra 1.8 alternator bracket and get it machined so the alternator belt mates up with it, I have got a 100 mile old alternator thats been modded with washers and a bit shaved off the bits that bolt to the bracket so it will fit in line with the pulley, only thing that lets it down slightly is the look of it.

PM me if ya want a price bud, with or without the alternator