I found a UK supplier that makes some Polyurethane bushing products.
For my 780s, they had the older fitment for the
upper and lower bushings for our Aluminum control arm.
4 x OE lower bushing is #3530223 (rubber) (IPD doesn't have urethane)
4 x OE upper bushing is #1205991 (rubber) (IPD has urethane)
They also have sway bar bushing of various diameters. I am also look
at them for replacement Bump Stop.
Price is very close to OE Volvo rubber, so this is a no brainer to go
polyurethane.
http://www.superflex.co.uk/products.php?cat=420