Tim,
I doubt it since they are pretty specialized. What universal remote are you programming? The least expensive solution is a JP1/OFA remote and they use a four digit code but there aren't any built-in codes for Sanyo projectors.
IIRC, there is a device upgrade for the PLV-Z2 in thte files. If the Z3 and Z2 use the same command set and that is likely, then it's pretty simple to upload the upgrade and you are all set. More information here:
[Link: hifi-remote.com]