I don't have that plane so I cannot answer directly...

However most of these planes use fairly standard sized servos.

You are always best off replacing them in pairs if you are working on matched areas such as the ailerons.

If you are replacing only a single elevator server, then you can purchase a single servo.

How about taking a close up photo of one of the existing servos and posting it here?

This should provide enough info to direct you to a replacment.