Variable defined renewal period for subscription products

I'm working on a site that sells flower subscription products.   The goal is to be able to offer bi weekly deliveries for 4 weeks, 8 weeks, or 12 weeks.  Currently I can only specify one renewal date per product.  So I would have to create 4 separate products just to cover the variants for this. Is there a way to set a renewal end period that is variable?  Something that would allow the below for one product...