If Marc's got Andy sorted, is there any chance you might still have these filters for sale? I had a set given to me but they floated off the under lens holder thingy I had so I bought a smaller set with frames around them. Having been given that first set, I thought it only right to, in turn, pass them on to someone in need. Since then I've acquired an enlarger with a proper filter drawer... and no 6x6 filters.
Molli, I'll throw them in the post for you. I'll head to PMs later today to confirm (and I'll reply to some other messages!).