Silvertop to Blacktop ECU patchs

[Lurkin]

Not sure what else to call them. Wanting to make something along these lines: http://forums.club4ag.com/zerothread?id=52518

Any ideas of whether it is possible to get the plugs/sockets new? if so are they likely to be cheap? or should I head off to pick a part? (would rather use new if possible.. cheaply)?