Yes, the Edmund tripod mounting bracket. Designed to attach the Astroscan to a regular video/camera photo tripod (one that has a 1/4-20 bolt). There are other interesting possibilities for using this (binoc attachments to tripod, spotting scopes, etc).
Edmund sells these new for $50.
Will sell for only $20. Add $5 for shipping/insurance U.S. priority mail, CONUS. (S & I costs more than that, but I'll absorb the difference.)
Note: you may not need this if you have a tripod head with a removable plate. If you can replace the standard 1/4-20 bolt with a longer 1/4-20 bolt, you may be able to attach the regular Astroscan table top base to the plate. Still, the bracket opens up other possibilities beyond mounting the 'Scan.
Feel free to respond with any questions.