I looked at a lot of booties (HA HA)... the ones that seem to be waterproof ain't cheap. And none of 'em are cheap this time of year.
If you want waterproof, you need a waterproof fabric with waterproof seams. The Pearl Izumi Amfib seems to fit that bill ($50). I bought a set of the PI Cyclone ($40), but they are not seam sealed, so I'm taking them back, unused.
This $40 Cannondale model is seam sealed, so it sounds waterproof:
http://www.performancebike.com/shop/...slisearch=true
The Belwether Aqua-no looks waterproof to me.
But you might just consider getting new shoes (!!!). The Lake MXZ301 is very well-liked for a winter shoe, and is $140 or $150 at Performance right now. Use the 10%-20% off sale and TP points and you might get it down to a quite reasonable price.
I bought a pair of Sidi Storms off Ebay... Should be here Monday.