to be honest in a 2wd you would be better with a high speed servo. the high torque is only really needed for 4wd or trucks.
i had a KO 2113, high speed with plastic gears, and the 2123, same spec with metal gears (more reliable). You can get these on ebay for about £35 or less.
Or try one of the new bluebird servos, they are normally around £35 new and the specs look pretty good for the money
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