My brother made this and we posted it in our local Mandalorian page on Facebook and it generated some interest. He is considering doing a run of 5 if there is interest. If everything runs smoothly and there is more interets he will do more. Cost right now he is estimating at $110 shipped in US. The kit will include the receiver and transmitter with 2 switches ( one up and one down)and the servo. Bear in mind he was only doing this as a test for his own helmet as a proof of concept. The buttons on his transmitter will be removed and extended.
Here is a new video showing the size and possible placement options. The gauntlets are RKD. ROTJ would be left gauntlet and ESB would be right gauntlet.
Please feel free to ask questions or comment. It can only help us provide you with a better product. We are looking into PWM as an option for limiting the 90 degree of motion and possibly control LEDs in the RF top as part of a future upgrade.