Quoted from BigAl56:Big Daddy, https://www.bigdaddy-enterprises.com/ Has complete board by board kits with everything you need including the keys.
Not properly replacing the connector key could be death to a game. When replacing connectors, especially on a power supply, remember to double and triple check the wire positions as you move them to the new connector. Being off by a pin and key is a potentially game fatal exercise.
1) Always insert the location key first.
2) Always do one wire at a time. Cut one off, strip, crimp, insert into new connector, move onto next.
3) Once you are done with a single connector, compare color codes to wires in old connector to make sure all is well before moving on.
Ed at GPE or Todd at Big Daddy are fine vendors with Todd's premade packages being a touch more convenient if you are unfamiliar with what you need in total.
I use both extensively.
