You should be able to buy the ECM from any one of a number of sources who sell Accell. Same with all the hoses, tubes, wiring harnesses, and other sundry parts as repair or replacement items . .
And there's also several sources for just the wiring components . . Although it's basically a street rod supplier, I get most of my electrical components from Kenny at Haywire in Joplin, MO. He has a plethora of neat shit at reasonable prices . .