High heat rare earth magnets

When I was attaching metal art to the brick bell of a mass heater, I chose to use rare-earth magnets epoxied to the bell, and my metal art attached to them.
On my double skin bell, this has worked perfectly.
I used the same method on Shorty, my single skin bell.
It seemed to work perfectly... until we had a cold morning, when I added an extra batch to Shorty.
Oh my, she really throws heat if you double up... unfortunately, standard rare-earth magnets do not hold as temperatures rise.
Permies rocket scientist Fox warned me about his attempts to use RE magnets, which failed as soon as the temperature rose.
And indeed he was spot on, as the second load in Shorty got to roaring, my metal raven art suddenly fell to the floor!
It was not damaged. But it refused to stay on the bell.
A search online and I found this https://www.kjmagnetics.com/products/high-temp-magnets?gad_campaignid=22284168230
Good to 428F or 220C. I doubt I could get the outer skin that hot on Shorty; our house is way too small.
Standard rare earth magnets are only good to 176F 80 °C

Cost is negligible, and they are holding perfectly!
If you want to add bling to your dragon, high-heat rare-earth magnets are the way to go!

Hmmm, now you got me wondering….

Could you rig up magnets to automatically close a bypass?  

Thomas, did you consider the pros and cons of the magnets vs mortaring some sort of angle iron into the outer skin?