Sure, I have 2 friends that built that boat. Any standard or micro servo will work for the throttle, a standard servo might work fine for the rudder but I'd do with one with a little more torque. I myself have been using Hi-Tec's a lot lately and have had good luck with them but whatever brand is your favorite will have servos for what you need.
BTW, seeing how you are using the Speedmaster rudder, cut about enough off the bottom of it so there is only about 1-1/4" of rudder below the prop. In stock form, there is too much. round off the bottom of it after cutting.