Seeking surplus, reclaimed or salvaged plywood

I'm in the process of re-roofing, insulating and boarding out a shed to make it suitable for use as a hobby workshop. I'll need about 12 or so sheets of ply (shuttering ply is fine).

The price of new sheets from the merchants is still ridiculous, despite the downturn in demand from builders. I'm looking for information on salvage yards that would have suitable sheets.

Ideally, I'd like to find a few sheets of reclaimed ply (appearances are not too important for my application). Tipperary/Limerick would be easiest, but anywhere in Munster/elsewhere might be justifiable if the price is right.

Thanks for any pointers!