i picked up my much loved, ex-pizza shop tray from St Vinnies years ago.
the non-stick one my dh bought a couple of years ago doesn't hold a candle to my 50c purchase.
perhaps try the 2nd hand shops, never know your luck.



otherwise a speciality kitcheware store should have it... not like house, but a wholesaler/distributor that also sells to the public. most cities should have a shop like that.

alternatively, why don't you ring the pizza shop where you've seen the trays and ask them??

good luk