10mm think square of aluminium?

Would anyone be kind enough to pop a piece of 10mm thickness aluminium about 65mm x 65mm in the post to me, please?

I'd buy it from a shop, but all the places I looked at want about £2 for the metal and £10+ for postage!

Thanks if you can help me out!
Simon

I might have some 10mm, how critical is the thickness? I've got plenty of 1/2" thick aluminium.

I guess that's okay, I could skim it down.

Much appreciated if you could pop a bit in a jiffy bag!

Other parts arrived well by the way.