Woven metal mesh.

[Mick Annick]

I don’t know if they do the size you want, but I get mine here:

Wire Mesh Archives - The Mesh Company

The Mesh Company offers Europe's largest range of wire mesh materials from Warrington. Specialists in Woven Mesh, Chicken Wire, Perforated Metal & Weld Mesh

themeshcompany.com

 

[RetroPug]

Weld Mesh

www.metalmaniauk.com

They do 1" weld mesh (as well as 2"), and can supply it in the size you want.

I've used them plenty of times, although never by mail order.