I have these running in a couple of amps. They work fine.
2pcs 45mm Round Moving coil Panel Meter DC100MA for 2A3 300B 6550 211 KT88 AMP | eBay
2pcs 45mm Round Moving coil Panel Meter DC100MA for 2A3 300B 6550 211 KT88 AMP | eBay
I've used these VU meters from Hoyt, they are a little bigger than the circular ones you can find from China. Lead time is a little long, but worth the wait.
Vintage style VU Meters | Hoyt Meter
Vintage style VU Meters | Hoyt Meter