Need Panel Meter for B&K Dyna-Jet 707 (or 700)

I have seen panel meters for my tube tester on google, but for some reason, I can no longer find them. anyone?
Screenshot 2024-02-02 at 11-18-34 ocarddol7tedgnmzq92j.webp (WEBP Image 800 × 600 pixels).png


Other info printed on meter: B&K MFG CO.. Dixson Inc. ME-12
I am no longer able to zero my meter as it never falls back to zero. always 1/2" above or below. impossible! must be broken beyond repair, so looking for a replacement.
thanks,
Walt
 
zeroed unplugged, then plugged in and zero moves, but never to the same place. if above zero and tap tap tap (20 times) and returns to zero. if well below zero, tap 20 times and returns to zero. zeroed while plugged in, then test and when let go of test button, always rests at different spot. the problem is mechanical and I cannot fix that without a microscope.