... An Ace Bantam Midget servo, to pair up with the one I built 30 years ago running the ailerons in a Goldberg Eaglet 50 kit that's Almost Done.
(Yes, I am crazy, no, it won't be nearly as good as a new servo, and yes, it'll cost more in 'real' terms than waltzing down to the LHS and buying a matched pair. But you build kits for the fun of it.)