Hi,Does anyone know of a website/catalog were I can purchase wiper blade refills only for my 65 gmc i-1000 series 1/2 ton.I'am not sure of the size? 12" maybe.Thanks in advance.

They are 13" with the wide blade. If you have a Pep Boys near you, they carry them for $3.49 a set. They are the only auto store that I have found that carry OEM type blades, but any 13" wide blade will work. I've seen them mail order, but can't remember where...