www.suffolkmachinery.com is another option. Just give them a call and tell them what saw you have and what you're trying to cut and they'll do the rest. In my experience they tend to insist on being helpful.
Out of curiosity, what are you trying to cut? A jigsaw would be a better option (and less expensive in the blade department). I would not anticipate doing a lot of resawing with this three-wheeler.