Lady Borton

Greetings, I recently bought a neighbor's 1986 GL wagon, which has been sitting idle for 10 years but runs and is in good shape. Except... Except that the mechanic making the car road-worthy for New Hampshire inspection needs an a/c belt idler pulley, part number SOA332A2033, which is missing from the vehicle. I've tried various sites on the Web, so far with no results. I'd be glad to have any suggestions. Thanks in advance, L