Snag of the AC Tensioner Pulley and Mount Bracket

I replaced my original AC for my 1994 Defender 90 in 2012 or so with a model from Rovers North. It was installed by LR Alexandria Va.

In the process of replacing my tensioner pulley for the 2012 installation, here is what we discovered...

1. The tensioner pulley currently on my Defender to be replaced on the system is shown in the below link.

2. The mounting bracket on the system now for the above tensioner pulley is shown at the below link.

3. The tensioner pulley and mounting bracket that came with or was supposed to come with the 2012 installation is show in the diagram contained in the instructions is shown in the below link.

   IS NOT KNOWN WHY THE TENSIONER PULLEY AND MOUNTING BRACKET SHOWN IN 3 WERE NOT INSTALLED IN 2012 OR WHY THOSE IN 1 and 2 WERE INSTALLED INSTEAD. IN FACT, WHAT IS INSTALLED NOW IS NOT EVEN THE DIAGRAM INCLUDED IN THE ORIGINAL WORKSHOP MANUAL FOR THE 1994 DEFENDER 90. (IMAGE TO FOLLOW), BUT I DO NOT KNOW IT WAS THE THE ONE WITH MY ORIGINAL AC.

4. A new tensioner pulley (ETC6159) was ordered from Atlantic British and is shown in the below link.  Clearly. It is the one shown on the diagram for the 2012 installation (see 3 above) but not the one on there now (see 1 above)


PROBLEM

I either have to find:

A...a tensioner pulley (and appropriate belt) shown in #1 above that will work with the existing AC Mounting bracket (#2); or

B..an AC mounting bracket as shown in the diagram in #3 that will work with the new AC Tensioner pulley (ETC6159) shown in #4 plus the appropriate belt for that pulley.

What needs to be determined is whether this item affects only the AC or whether it has any impact on the engine's performance.  If no impact, i can have this part installed in Seattle or even when i get home since i certainly don't need the AC now .  If it does affect it, i have a big problem since no mounts can found for the old pulley or the new one so far.

What is baffling is that i inspected the old pulley and it clearly is broken. But why, then, was the AC working just fine when i last  used  it in August?