The carb is a 'Zama', made in China. That's the only markings on it, except for the choke valve. It has '58' stamped on it. I'm taking the whole works to a chainsaw repair store today to see if they can fit something to it. I will defintly keep you all updated on my findings.

EDIT I found 'H58B' and below that '42A' stamped on teh fuel inlet side. On the needle valve side, I see '0.1M'.