I just went through all this on my 1.6TD. Maybe this will help a bit.
First, here's a pic of the A/C bracket that was on my 1.6TD with A/C (in my caddy). It's the one on the right. The one on the left is for a Quantum.
In this setup, the alternator is on top, in front of the engine above the compressor which sits in it's own adjustment bracket down by the water pump. I hated it... my a/c never worked, it was heavy and I constantly had tensioning problems with the belt. Removing the bracket and getting at some of the recessed bolts was an "exercise" in patience to say the least.
I then got a hold of an entire non-a/c setup from a 1.6 NA engine (mk1). It adapted perfectly to my 1.6TD. There are three parts to it not including the pulleys:
- bracket that goes against the water pump (later cast one in this pic, although some were stamped / sheet metal that apparently broke often)
- Alternator adjustment arm (sits near the bottom of the engine rather than on top like the a/c setup)
- Timing belt cover support arm.
The pulleys are slightly different to account for the offset of the alt pulley and of course, the alternator is different as well. I think the main mounting ear is shaped differently than the a/c unit since it sits in the place where the a/c compressor would be.
When I bought my new non-a/c alt, I made sure it had the "W" terminal for the tach conversion. I think a rebuilt unit cost me around $90 or so.
I've been running the non-ac setup for 5 months now and I haven't had to even touch the alternator adjustment. This is a night and day improvement over the a/c setup which I fiddled with every few weeks.
Hope that helps you in your search... FYI, I got my non-ac setup from a friend on the west coast where something like that is relatively more common than out here in Ohio.