me again. a quick check of ebay shows that the jobber vendors are touting the dfi part as the same as the 986 part, so this idler pulley bracket should work:
Welcome to BGB Motorsports
which means i can run without a/c or ps pumps. $250 for the bracket + $100 for a used boxster power steering rack to convert to manual (+ install cost). save a few pounds, gain a few more hp, more road feel, get arms as big as tree trunks ...