So it seems that most of the advanced cybernetics not duplicated in Saga from the RCR simply grant a skill bonus. My original thought of using Tech Specialist with Mastercraft Device seems to be on point. The skills I've listed with the cybernetics are the ones that I feel could be logically associated with the limb. The cost of these limbs includes the price of Tech Specialist or Superior Tech. It should be noted that a GM should feel free to disallow the bonus if they feel it doesn't qualify. For example, an enhanced cybernetic leg should grant the bonus on an Endurance check to run, but it's not going to help an Endurance check to hold breath.
Improved Cybernetic Arm
This cybernetic limb has been tinkered with to provide it's owner with an additional edge in skills where you use your arms and hands. It grants a +1 equipment bonus on Climb checks, Mechanics checks, Pilot checks, Swim checks, and Treat Injury checks.
Cost: 3500 cr
Advanced Cybernetic Arm
This cybernetic limb has been engineered to provide it's owner with a significant boost to skills where you use your arms and hands. It grants a +2 equipment bonus on Climb checks, Mechanics checks, Pilot checks, Swim checks, and Treat Injury checks.
Cost: 5500 cr
Improved Cybernetic Leg
This cybernetic limb has been tinkered with to provide it's owner with an additional edge in skills where you use your legs and feet. It grants a +1 equipment bonus on Acrobatic checks, Endurance checks, Jump checks, Ride checks, and Stealth checks.
Cost: 3500 cr
Advanced Cybernetic Leg
This cybernetic limb has been engineered to provide it's owner with a significant boost to skills where you use your legs and feet. It grants a +2 equipment bonus on Acrobatics checks, Endurance checks, Jump checks, Ride checks and Stealth checks.
Cost: 5500 cr
Improved Cybernetic Eye
This cybernetic limb has been tinkered with to provide it's owner with an additional edge in skills where you use your sight. It grants a +1 equipment bonus on Gather Information checks, Perception checks, and Survival checks.
Cost: 3500 cr
Advanced Cybernetic Eye
This cybernetic limb has been engineered to provide it's owner with a significant boost to skills where you use your sight. It grants a +2 equipment bonus on Gather Information checks, Perception checks, and Survival checks.
Cost: 5500 cr