Single service selling template


I am looking for a template that sells single service.
It should have the following:

  1. Checkout system.
  2. Affiliate system.
  3. On the checkout page I should be able to add extras like in fiverr where you select extras for the gig.
    Can be a wordpress template so I can integrate woocommerce and affiliatewp into it
    I have looked into the existing ones and they don’t look good.