Rather than the current system, where cybernetic limbs are package deals, why not use something a bit more modular and personalized? Rather than restricting cybernetic limbs to their 'factory default', why not open it up a bit more? Have the actual 'install' be just a mounting plate. On top of that, open up the limbs themselves to more customization. Let mechanically inclined PC's have a bit of fun with it, so you wind up with these sleek, slick looking custom bits of chrome from topside, and these much clunkier, more utilitarian bits down in the Mix. Plus, depending on the 'grade' or quality of the original limb, dictates how many upgrade/module/whatever slots can go into it.
Again, spitball idea that my brain dredged up, and I have *absolutely* no idea how hard it'd be to implement, and I'm sure there's far more to it buried somewhere in my head than what I'm typing here, so ask any questions about the idea and I'd be more than happy to elaborate!