I had spacers on my 421 that adapted from the low deck pattern to the tall deck pattern. Then a mopar water pump bolted right up.

Tim Davis of Indy made the spacers. They were the same thickness as the stock timing cover. It would not be rocket science if you could give someone the pattern of your 9.2 deck block and a stock water pump. Any CNC shop can make this. The cost is much less if you can fin someone who has already done the work. I could probably make some fairly easy with my cheasy XY table and cutter in my drill press. Someone like Andy or Ritter or Davis could sell you some cheaper.

Leon