Swami,
If you have the saw that I'm thinking of, the blade runs in a triangle vs. an oval shape, this saw is meant to saw wood. Metal cutting band saws run at a much slower speed than there wood counterparts to reduce the amount of heat generated, heat is a blades worst enemy. Because metal is harder than wood, the tooth on the blade has to take smaller bites but to compensate the blade has more teeth. As for tooth count, I would not go below 24 teeth per inch for the size material that you are cutting. Let the blade do the cutting, don't force it.
I would not spend the money for a carbide blade unless you are a production shop. My choice would be a bi-metal blade. The high carbon or high speed steel blades wear out way too fast. Now the answer to the million dollar question, where to find one. Your blade size is not a standard size when it comes to bandsaws. Standard sizes are 93 1/2" and up. Your best bet is to have one made up to your specs. Right now the name of the store escapes me but it is a nationwide one, I will think of it. We have one here in town and I can picture it but still the name?
I will drive by it next week and post the name of it.
If it's not nailed down, it's mine.
If I can pry it loose, it's not nailed down.