Columbia has a Scout Urethane. That's really all that I know of. Urethane is a "dead" technology. Most people don't want one, so companies don't make things that won't sell.
Myself I am a BIG fan of Urethane! I just picked up a Storm Blue Flame Urethane from eBay for $30 shipped, NIB.
If you were looking to get one, there is a seller on eBay, (just search Urethane in the bowling ball section) that always has a couple Brunswick Power Groove Blue Sanded Urethane balls listed. No one ever bids, starts at $9.99 with like a $24 shipping charge. You can get one cheap.
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MY ARSENAL:
Columbia 300 Beast (Baby Blue Urethane)