glass top replacement

dont know if the digit after the G in the model number is a letter or the numeral 0. the glass cracked on my top, the heating elements and the oven work great, i saw on here that the glas itself can just be replaced, where cani get the glass and how do i replace it? i was told i should just buy a new stove, there is nothing wrong except the cracked glass. please help. thanks. i found a main top to purchase can you tell me if there are instructions or diagrams to install it?