For EDIS, look for the Megasquirt and Megajolt guys, as they use that stuff a lot.

Or this FB group has a superb ability to locate sources

https://www.facebook.com/groups/4359499570789592
This crowd to MS stuff

https://trigger-wheels.com/store/index.html

Although they do also look very like the quite common superseal 1.0 series as per many aftermarket ecu's these days. Just depends on their dimensions

https://www.shopbhp.com/products/ecu...superseal-null

https://uk.rs-online.com/web/p/autom...minals/6809705