Tube guards/cage for Elekit TU-8200

I'm about to embark on my first build (TU-8200 - yes I know it's a kit but you've got to start somewhere!).

I'm expecting the kit to arrive direct from Elekit on Friday ready for my weekend brushing up on my soldering skills.

Question is - does anyone know of, or can recommend some form of tube guard or cage that will fit on the kit? I've got an inquisitive cat and my wife can be relied on to grab a tube when it's hot at some point.

Also, I've got a pair of Monitor Audio BR1s - I get the feeling that they would be sensitive enough to be driven by the TU-8200, am I right?

Any help or suggestions would be much appreciated.