I'm working (slowly) on getting the light working on my S-4. I've started machining a master lens to make a mold from. Once that's done, I'll cast one in epoxy or urethane. Then I want to make a switch to replace the missing one. I'm all for the look and feel of the original, but I want better, so I'll replace the bulb with an LED and then maybe use a 9V battery or something to power it. So, it's going to look original, but it'll work better.
I find it interesting that new USA made jacks are so expensive, but a lot of these older jacks can't be given away. Then there are those who are trying to get top dollar for them, just because they are old. It's an interesting dynamic. I kind of get the feeling that those who are really interested in them, would rather buy them and fix them up, so they aren't looking to spend a lot of money maybe? Then again, we spend a lot of money fixing old stuff up sometimes.
I still get a chuckle out of all the times people ask for recommendations and there are so many replies that the jacks at Harbor Freight are the greatest thing since sliced bread. I get that sometimes a guy needs the low profile that some offer, but I can't believe that anybody mistakes them for a top quality product.