I'm guessing you mean an extension? If so, TC does not, and I don't know about Uncle Mike's. I'd advise you to stay away from hammer spur extensions on Encores - they often lead to misfires since they affect the speed of the hammer strike, and can even lead to fractured or broken hammer. As I understand it, TC recommends against their use. Their answer to the problem is the Pro Hunter Swing Hammer which allows the hammer to be swung out to either side for better grip with low clearance scopes. I think you can get the swing hammer retrofit into any Encore for less than $100.
Hope this helps.
Just a Shooter