... Can't give you any specific references but can suggest 2 things.
1) Check out this site. It talks about SPF roofs. Roof Central. If you go 'back' to their home page, you'll get a top-down 'view' of Roof Central. Maybe they have an e-mail address and they can give you more info on how to locate an installer.
2) Check the Yellow Pages under Roofing Contractors and read the fine print in the Ads. Maybe the word 'foam' or 'SPF' will pop up at ya.
Hope this helps and to be honest w/you, I don't know the contractor or specific product used on Bob's show. The show you're refering to is a re-run from a while ago (I believe).