The 2101s and the 3211s use the same choke cover.

One issue (will not effect the OP as he has the original spring) is that a FEW of the more than 500 different Carter chokes have a spring which uncoils in the opposite direction. If one just buys a cover / spring, best to check the direction of travel of the spring. Your spouse's hair dryer can be used for testing on your bench.

Jon

Good carburetion is fuelish hot air
The most expensive carburetor is the wrong one you attempt to modify.
If you truly believe "one size fits all," try walking a mile in your spouse's shoes!
The Carburetor Shop