Echlin Voltage Reglator VR32

So, is there an electronic one available with the same wire harness connection, or do I need to change my wiring, as well?

If you don't care what it looks like, I got a Wells/Airtex 1V1067 several years ago that has worked fine. The cover is chromed, and maybe 1/3 the height of the original electro-mechanical. Here's one on FeeBay: 69 Mopar Airtex 1V1067 New Alternator Regulator Charger Dart Cuda Roadrunner GTX | eBay

There are at least a couple electronic units out there made to look like the original parts. One is a Chinese part made by Regitar. These sell cheap, and are all over Ebay. I just got one from FBO Ignition that looks good, and is claimed to be American made. I haven't installed it, so I can't give a report on it's performance. I've heard good things about the company, though. I got it with a 15% off ebay coupon, but they have a "make an offer button" that looks to be worth trying. Mopar Electronic Voltage Regulator - Correct Restoration Look 3 Year Warranty | eBay