As Q notes the current listing on Llanerch's site does not list the book, but the Traditional Song Forum meeting of The Traditional Song Forum Meeting of May 2001 has the following entry:

"Llanerch press is, sadly, ceasing trading. They are clearing their stocks and some of their books are on offer at attractive prices. Their last publication is Roy Palmer's collection 'Thomas Ford's Ballads' (A Collection of sheets published by Thomas Ford of Chesterfield in the 1830s). Roy has a few copies of this book for sale."

Quite what this means about Llanerch is unclear, but it does suggest you might get a copy of the book from Roy Palmer.

Mick