With my spoiled kitties, I don't know the word "cheap". They'll only eat 2 flavours of Merrick wet food at $1.69 a can.
I'd just suggest letting your fingers do the walking and call around in your area and as also suggested, try on-line.
I tried the on-line route, but it costs too much for shipping and would thus bring my cost higher even than $1.69 a can. Customers and Duty don't help either.