Static page to custom checkout page

I am trying to figure out this solution. There will be a static page for a travel company. Each package will have an individual page for each group of travelers. The URL of the unique pages will have a unique ending to the URL. For example…www.domain.com/lz-006iupui.

There will be a link to “Buy Now” on each page, when they click that I want them transferred to a custom checkout page with unique page id on a field (i.e. Group : lz006iupui) in the credit card authorization form. The other fields of the credit card form will be the same for all packages.

There needs to be a field for them to input their email address so they get a checkout confirmation email once they pay and the site admin needs to get an email with a checkout summary as well.

Any feedback will be greatly appreciated.