Have you tried the Volvo recyclers like Erie Vovo?

Since this is a part that "rarely" fails, there should be tons of 'em around. There's a used non-TRACS pump on e-bay right now with a "buy it now" price of $500. Considering demand, that's probably even on the high side.

-BTC

'98 V70 T5 5-speed, 160k mi, front IPD stabilizer bar, rear factory HD bar, Bilstein HD, Volvo strut tower brace and skidplate, e-codes, V-1, Mobil-1 since new

"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at or repair." -- Douglas Adams (1952-2001)