Is there a Snapshot that shows Buy List potential quotes, pivoted by Supplier details?

Yes, we have released a new snapshot to extract that information, called 'Buy List Quotes Pivoted by Supplier'.

This snapshot lists every product on the chosen Buy List, and includes every Supplier and the Supplier's ID, that could potentially quote on a product. The report includes one column containing the unit price, and a second column containing the tax percentage.

A limit of 750 Suppliers will be included in this snapshot.

Check out this article for more details on How to generate a Snapshot report.