Thanks for posting this, Tim.
As I said in the review, Werner's Wings is releasing a full line of upgrade/conversion sets for the Kitty Hawk H-60 kits. It looks like there are already a few available at their
website.
So far these are what is available:
35-21 MH-60A/L Operation Gothic Serpent Backdate Set

35-22 M-197 20mm Cannon for USN MH-60S

35-23 UH/MH/HH-60 7-Bolt Wheels - early

35-25 UH/MH/HH-60 14-Bolt Wheels - late

35-27 UH-60A/L Backdate Set

I used many of these parts as pre-production tests on my recent
MH-60A Super 65, "Heavy Metal" build. All the parts are awesome and fit the Kitty Hawk kits perfectly.
Keep an eye on their site for more to come.