Check out Hook & Hackle, www.hookhack.com. Ron has had kits on his site for 10'6" 4 wt rods, as either a blank or a kit.
Here's a direct link to a kit I found on their site... http://store.hookhack.com/prodinfo.asp?number=XG1044K
It's a little more than your target price (the blank is 130.00), but they have sales and discounts every week, watch their site for a sale....
Good luck!
-Brian