Customise BigCommerce Gift Cards

I have a bigcommerce website. I currently have gift certificates enabled, but I want to have two different types of gift certificates: one for products and one for classes I want to be able to sell gift certificates for classes with three price options and a custom design for the certificate. And I want to be able to sell gift certificates for products with a few options for prices, plus the ability to have people put in their own price amount - along with a custom design for this certificate. Both certificates will need to work with voucher codes. I can provide the basic images for the gift certificate designs, but you may need to resize the images to make them work on the gift certificate image size.