sears suburban 725 model 19

i just recently got my hands on a sears suburban 725 model 19 and have a bremen carburetor and was wondering is there are any websites that sell those carburetors i don’t want to throw a whole new motor onto the tractor unless i have to

Should be an updraft carb, not sure exactly where to get one.
I haven't bought one for my 725, but it needs a complete rebuild