>>63959589
ive had good luck with a no name mount on aliexpress for like 50$, just get the metal ones not the "nylon" plastic bullshit, if you are willing to spend a little more something like a argus a4 will be way more stable and durable.

if your lending it out honestly something like a crye nightcap is gonna be way more comfortable than a helmet that probilcy isn't even really gonna fit them properly. Emmerson also makes a nock off nightcap that from my experience is basically just as good minus the foam behind the mount. but that is easy to replace so.