Product variation specific Thank You/Fullfillment emails

Site URL: http://www.wordplaywriting.co

My products are classes that are hosted on several different platforms. With that in mind, I need to be able to send different links depending on which variation (time/date) of the product they purchase. I can't work out a way to do this on SquareSpace-- the closest I can get is product-wide email campaigns/thank you emails. Am I missing something?

I'm actually fairly certain already that this can't be done from within SquareSpace, but I'd be interested to know if anyone has found a workaround with another email list manager.