Gauging interest in making new alternator voltage regulators

I've heard a lot of complaints about the quality of many Mopar electronics going downhill or just becoming no longer available, and it has me contemplating making new ones myself. These would be made in the USA as much as possible (a lot of the individual components have to be bought wherever they're made, but I can keep the PCB and assembly here easily enough), clean slate designs with modern components. I'm thinking a voltage regulator would be a good starting point; they are fairly straightforward compared to other items and I've had several requests. These would be a bit more expensive than a parts store part (possibly around $80 for a voltage regulator, give or take), but the goal would be to deliver a more robust design with higher build quality. If I did this, what would people be interested in?

Single or dual field regulators?

One interesting suggestion that cropped up on another forum was a switch to allow setting the regulator for gel cell, AGM, or regular batteries.

Connections can be spade terminals (affordable and they just plain work), I can find a way to copy the Mopar plugs, or use Amphenol AT or Deutsch DT plugs at a higher price.

Housings - cheapest option would be a brand new plastic box or mold the whole assembly from potting compound, but I could do sandblasted and cleaned OE housings if that's what people prefer.

Or is there something else that is a lot more urgently needed?