I need to replace a couple of flooarboards in my dining room - the
problem is that I can't seem to locate replacement boards of the
correct thickness.

The existing boards are 22mm thick - and the only sizes I can get from
a timber merchant are 18mm or 28mm.

Has anyone ever had the same problem?
Any suggestions (other than going to a saw-mill have having a
few ,lengths custom machined?)

Thanks,
Mark.