During the process of, again, rendering a bunch of under-hood stuff "in pieces", I removed my strut tower bar that's probably been installed for the past 5 or 7 years.

Once I removed the passenger side mounting plate, to my horror I saw that the portion of the bracket that over-hangs my low pressure side A/C hose and been in contact with and has been marring the hard-line portion of the A/C hose ... right there:



Anyway, does anyone have any leads on a spacer appropriate for this situation?

Something like this:

 

 

There is supposed to be an OEM bracket on the side of the strut tower which holds the AC line in place, and protects it with a foam/rubber insulator. I think I see it lurking within your red circle. You can loosen the bolt that secures it to the strut tower and slide it down a 1/4" to give the AC line adequate clearance.

Also, the AC line is soft aluminum. Very gently, you can simply bend the AC line just a little and you'll have the adequate clearance to prevent rubbing.

 

^^^ +1

 

I agree. And you gotta do it when you put the supercharger on.