There is a very reputable dealer on e-Bay, FCP Groton (FCP = Foreign Car Parts), that sells high quality entire front end kits consisting of both control arms, with bushings already pressed in, plus tie rod ends, and in the case of the 6-cyl E39s, they include sway bar endlinks as well. The entire kit is something like $449 for the I-6 5-ers and (in a rare case of economy) only $315 for the 540M5 kit.
I think that's your best deal. Replace it all for about what it would cost to replace just two arms and bushings.
2006 Honda Odyssey EXL-RES
2006 Honda Accord V6 EX-L Sedan
1999 BMW 540i 6-Speed (Sold to M3UOND on 9/21/06)
1991 Honda Civic Si - Occasional Beater