Bensur

I am trying to make a belt buckle from Mokume Gane, but I can’t find and material to do so. I don’t have the time or workspace currently to make my own billet. I have trying to find one to buy, but everywhere I look is either way to thin at like 20 ga sheets or not wide enough with all I can find being inch or inch and a half. Id like a roughly 3x5 sheet 1/8-3/16 thick. Any help sourcing would be appreciated