Help Junkyard coil for HEI distributor?

That is a 5.0 Ford E-core coil. They are about $20 at auto parts stores. If you want fancy colors, marketing hype, then pay 2x to 3 x more.

But are you sure the coil is bad? It could be something else. Got 12V at red wire? Have you put a plug on coil wire and checked for spark while cranking? There are more tests if you would like to learn to trouble shoot.