Use Stripe instead of PayPal on VPS, needs SSL (Pro Sites)

Hey guys.

I want to use Stripe for my Pro Sites payments, instead of PayPal, as it would be a lot easier for my costumers. I will need some kind of SSL certificate, but i don't know where to get it, which one to get, and how to set it up.
Do i need a wildcard SSL, as Pro Sites uses the users own domain (mapped or with subdomain) on the network?