Assembled in the USA and MADE in the USA are not exactly the same thing. Show me the actual origin of the wire and rubber and I may loosen my opinion...slightly. There is NOTHING wrong with 40 year old wire, providing it has never been overheated, and that is an obvious issue when it happens.
Here's the bottom line. There is plenty of repro **** out there...problem is, nearly all of it is just that...****. Looks good when it comes out of the box, but a couple of seasons worth of normal exposure, and it all starts to show its true colors. If there are zero options, then yeah, repro is the way to go. BUT, if you can find a quality original part, it is ALWAYS better than what can be sourced through the aftermarket.