All Products for Woo Subscriptions

I have a product with 3 variations (30 pack, 60 pack, 90 pack)
I’d like to add subscriptions to 2 of the variations (60 pack/month, 60 pack/2 months, 90 pack/month, 90 pack/2 months).

In other words, I’d like to be able to add individual subscriptions specific to a single variation of a product.

Thanks