HO scale grills

thanks to all for the info went on biodiesel supply great site lotsof different mesh screen

If it's generic fine mesh screen you're looking for, try Utah Biodiesel Supply. They have 6" x 6" sample packs of stainless steel fine mesh screen in various sizes for about $7.

Not so easily obtained I know, but if you have access to automatic transmission filters, the internal filter in some is a micro mesh material that is metal , nylon or both.The scale is excellent for 1/72 and smaller.The ones you don't want use a felt filter.

had tried plano not what I need but will check out the others and the mr coffee thanks

Plano Products or a company called Highliners make locomotive specific grills. If you're looking for generic screen/grill material, I've seen old Mr. Coffee screens used to good effect.