I dont Im afraid. I built my own hooking up sams database (with his permission). If you go that route you will have to build your own interface and you will require a knowledge of a programming language and a server with a database to store any other info you want (such as exchange market values etc). I used php & sql, but thats up to you what you use.... irrc it took me a few months to build it.
Even then it doesnt hook up to anything that gives you the ISP prices.
If there was something that did this for free then I'd be using it
Broadband choices do an API of sorts, but I decided it wasnt for me. They dont include all ISPs, you have to do minimum sales (100s?) per month, I cant recall how much they take (50%?) .. oh and you need to be VAT registered. This is a not for profit site, anything we get goes straight to cover hosting costs (its busy so I need my own server)... and I like to be able to tell it how it is regardless of whom the ISP is.. and not tied to anything that recommends an ISP because it gives commision. Thats not the way we work around here
