Thanks for the input so far. I agree, there is a certain charm in the randomness of the older D&D systems and the M&T assortments, which is something I miss in S&W.
I've been toying with the idea of making up a one-roll chart with the "low value" items on the lower end of the table and "higher value" items at the high end, then modifying the roll by the monster's HD or "challenge level".
Something like this that could incorporate the existing treasure tables:
Roll 1d12 and add HD:
1 - 2d8 c.p.
2 - 2d20 c.p., 2d6 s.p.
3 - 2d12 s.p., 2d12 g.p. (50%)
4 - 1d6x10 each of c/s/g.p., Minor Item (50%)
5 - (...etc.)