Product Variations / Sub Variations?

Hi,

I am looking for a more advanced form of product variations for digital downloads. I have CSS-styled radio buttons to select the variation:

1. Product Variation A
2. Product Variation B
3. Product Variation C
4. Prod. var. A + Prod var. B (discount x)
5. Prod. var. A + Prod var. C (discount y)
6. Prod. var. B + Prod var. C (and get prod. var. A free)

Now this can be done already, as you can see on:

https://www.trancewerk.nl/angsten-en-fobieen/vrij-van-angst-om-uitgelachen-te-worden/

Now when someone selects an option that contains “Prod. var. A”, which is in this case 1, 4, 5 or 6, there must be an accordion opening beneath the selected variation. This is because Product Variation A has in fact 2 sub variations (‘Long version’ and ‘Short version’).

Any idea of some code or plugin that can help me do this?

https://www.ads-software.com/plugins/woocommerce/