~ tire rack sells them too (valeo wipers)... buy one get one free... @ $19. each. (promotion ends 12/31/06)
you'll need ~ 20" driver side / 21" passenger side.
link:
http://www.tirerack.com/accessories/...es&make=Valeo&
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i have them on my '06 330i bmw (standard equipment)... they work great imo!!