Can’t help with that, but if you are in need of a filter now, did you hear about the Compact Filter option (that is available now) that you can opt to get instead of the Glowforge filter?
More information on it here, and if you do want to switch instead of waiting, you can send an email to support@glowforge.com to let them know. A lot of people who originally ordered the Glowforge filter are already using the Compact Filter now.