Probably the cheapest which is the Hogue stock, personally I think they are the most 'orrible, and worst stock I have ever used...but some people love them!
$99 and available in a wide range of colours / styles including thumbhole.
Available on the CZ as well.
EDIT: Forgot Link - Sorry - http://www.boydsguns...l=231&Action=11
Edited by Alsone, 10 January 2015 - 02:51 pm.