@ Seán

That's a pity; it was a long shot, but worth a try. One problem is that although there are a number of institutions and libraries which hold collections of broadsides, not all of them have got very detailed catalogues, and I'm sure there are some instances where the libraries themselves don't know what they've got!

It may be worth posting your query to the Pedlars Pack:Broadside and Chapbook Research Group.

Here in the North West of England the Harkness Collection of Broadsides at the Preston Harris Library, Lancashire County Libraries, has a large collection of broadsides by printers besides Harkness, and could be worth exploring.

Matthew