WTB: foam grips

Buggered if I'm paying $20 for a pair of foam tubes. My MTBing
colleague down the hall says bicycle ones are just as expensive. I've
tried lagging, but it doesn't take well to twisting and crushing (good
value at $5.50/m though).

This is the best deal I've seen:
www.munichmotorcycles.com.au/Munich%200304%20Cat.pdf

(photo here):
http://www.vehicle-wiring-products.co.uk/VWPweb2000/mcycle-
3/photo/baj.jpg

Any suggestions?

Gary