Looks like there are more options available now. Options are always a good thing.
Aridus has one in the works. There was a YouTube video talking about it.
GGG is also making one that integrates with their version of the Zhukov handguard.
And I found another from a company called SHOTGUNHEATSHIELD.COM that works with the Zhukov. It looks like they used the Mossberg heat shield and contoured it to the Zhukov profile.
https://www.shotgunheatshield.com/be...el-shroud-mod/