What a cool set of speakers. at 110dB, you need one watt or less in most listening situations.
I have a Tektron (italian maker) Amp that uses 45, 2A3, or 300b and the 45’s are less than 2 watts and more than enough with my 96dB speakers. The 845s are actully way more than you need. Mastersound makes great amps. Sorry this one isn’t doing well.
Decware makes a magical 2 watt amp, the SE84UFO2. You’ll have to find one on the used market since there is a 2 yr wait. If you go on the Decware forum and post that you have an utracool set of speakers that you’d like to listen to with a decware amp, a local owner will likely bring his amp over for a listen. I would.
The new Aric audio 2A3 looks interesting but I haven’t heard it.
Or have an amp custom built. that would be the way to go.
Jerry