Aircraft ply

Just checking to see if anyone has some sort of aircraft ply handy that they could send me. I’m making a spacer for a non airworthy part (an electrical socket) and have found that normal household ply (made of 3 layers) has a nasty tendancy of bits falling out of it when worked alot, I’m hoping aircraft ply is a bit more sturdy. I’m only after a piece 50mm x 50mm x 10mm. If anyone has a piece they can pop in the post I can pay with paypal,
cheers
Matt