The following are my personal: experiences, recommendations, and opinions - concerning pocket clips for HDS flashlights; Clicky and Rotary. YMMV
In general and for either light, per the HDS "Universal Pocket Clip", stay away from that monstrosity.
For the Clicky, I again recommend staying away from the HDS clip and getting the EDC Titanium version.
Having tried it, I agree that the clip for the ZebraLight SC80 and SC600 works "pretty good" on the HDS rotary. However, even with the addition of heat shrink, I found it a little loose on the flashlight and as it clipped to my pocket.
Keeping with the Rotary, and again for me, a better alternative is the pocket clip for the Fenix LD22. I recommend adding heat shrink tubing. Had I not had to order this clip from another country, it would have been more affordable. But, the secureness with which the clip retains itself to the HDS and the sureness in which the end of the clip grabs my pocket made the purchase worth the price.
As of the writing of this post, there are eBay listings for 20 – 22 mm flashlight clips which appear somewhat similar to the LD22 clip.
See the Fenix clip in the picture directly below.