You can probably get it from Metered Light. Last I checked, the best way to contact them was through the contact info on their blog. If you can't find one, send me a PM with your e-mail address, and I can send you a PDF of my Metrolux I manual, which should probably give you much of what you need to know. There are several versions of the Metrolux with small incremental changes, as I understand it. I think the main difference between I and II is that the II can take two probes, but there are also smaller differences among the various versions.