Have a look here:
https://www.bintel.com.au/product-ca...apters/page/2/ (although the Televue ones are very expensive!)
or here:
http://www.andrewscom.com.au/optical-telescopes - scroll down to Guan Sheng Optical, and scroll down again until you get to a range of different adapters (right at the bottom of the page). Hopefully one of those will be what you need.
All the best,
Dean