How would I set this up?

So currently, I have a parent ASIN with 5 child ASINs. Let’s call it “Widget” that comes in 5 color options, like this:

Widget (parent ASIN)
– Widget Color A
– Widget Color B
– Widget Color C
– Widget Color D
– Widget Color E

I have created a new “Widget Add-on” product in each of the respective 5 colors that I’d like to add as an option to each of the child listings. So this is what I’d want it to look like:

Widget (parent ASIN)
– Widget Color A
– Widget Color A + Widget-Add On in Color A
– Widget Color B
– Widget Color B + Widget-Add On in Color B
– Widget Color C
– Widget Color C + Widget-Add On in Color C
– Widget Color D
– Widget Color D + Widget-Add On in Color D
– Widget Color E
– Widget Color E + Widget-Add On in Color E

I don’t mind selling the individual Widget Add-ons on their own under a different parent ASIN, but I don’t want them to appear by themselves as an option under this parent ASIN.

Suggestions on how to do this?

Thanks!