We're pretty fortunate to have them in the area. They rebuild diesel pumps, sell new ones and any parts needed. Lots of other engine/electrical components too. But looks like it was sold out to another owner and don't see WICO parts listed, so I may need to find another source myself. But, I'll post a link to their business to give you an idea.
Diesel USA Group Columbus | Formerly Columbus Diesel Supply
I've heard a lot of good things about Brillman products, mostly new wiring harnesses for older classic tractors, but somewhat pricey. I looked at their harnesses back when I converted my IH 130 & 140 back to a 6V system and decided to make my own. Bought the proper colored sheath wire of proper gauge, solder type connections, shrink wrap, heat gun, and new soldering iron for less than the price of one harness. Found the color coding for the wiring harness online, so it was only a matter of making it.
I had an ignition coil rewound for a Fairbanks- Morse engine by Standard Magneto back in the early 80's. Back in the day when you put the magneto and a $50 bill with your return address in the box and sent it off to be rewound. Got it back within 7-10 days good as new. Pretty sure I saw where they still do that but have to call for pricing.
I hear you on the globally produced products. I got one of my old Wheel Horses out last year and decided to freshen up the ignition. Checked online for Kohler OEM parts and was over $50 for points & condenser. Checked NAPA and was under $20. But NAPA seems to have dropped the Echlin line for small engine selling under their name now. Got it out in March to pull another Wheel Horse to the shop for repairs and it fired right up. 5-6 weeks later went to get it out to cultivate in the garden and it was a no start. Deduced no spark, cleaned re-gapped points, and still no start. Decided it was 1 of 2 condensers. Checked for OEM Kohler condensers and price was even higher than before. Went to NAPA and got both for $14. Guess we'll see how long these last.
We also have a semi-local oil field supply shop that repairs mags for oil field engines. I heard through the grapevine that their condensers only last for a couple years at best. Whether they changed suppliers because of a better price I'm not sure but sounds like "globally sourced" parts to me.
I'd rather pay a little more for a quality part, but 4X-5X as much seems pretty high.