Has anyone tried the aftermarket 4-wire solenoids for the Corsa Captain's call? Corsa no longer makes the 4-wire version. The sell a conversion kit, but I was wondering how well the aftermarket solenoids work? Has anyone had experience with them? Which ones? etc. Thanks in advance.

Yes, numerous times, tried the ones usually were around $30 and they work great, the only thing is the wiring schematics are a little bit different. They are not color-coded.

plenty available on eBay

I feel like all of them have the Black/Red/white wire, but I see some with a blue wire and some with a green. So are the blue and green interchangeable? The CORSA unit has a green wire.