Yes, connectors are stock. I don't know if there are any aftermarket connectors. All other parts are custom. I've soldered the wires from connectors to wires from cable, then iso'd it with foil and covered it all with thermocontractable tubes.
I can't tell if there are any difference between this cable and stock, but due to good shielding (it has internal wire shielding, and additional shielding - ground wire braid) it sounds a lil cleaner in electrical-noisy environment. If your rig is near computer or in other places, surrounded by electronics, you may try to make similar cable too. My rig is placed far from any electronics, so i don't need additional shielding..(in fact, stock cable haven't any-there are only signal wires and isolation).
I'll make some additional listening of course.