Ok I’ve been playing with the Aitoc Extension “Paired Products” on their Demo site. I have to say it’s pretty cool. I think they named the extension incorrectly because you are not limited to only two products as the name implies.
HOWEVER… I have one major problem. I need to make the custom options required for ONLY the items they select.
Please see attached image.
It actually does have this functionality! I overlooked this the first time. Sweet!
Click thumbnail to see full-size image