Original Audio Note Meishu Line (non-Tonemaster) is an all-time favorite - really an exceptional component and is 300b excellence. They sell for $5-$6K super rare. GL with this one.
Audiomat Opera Reference. French small batch hand made EL-34 based integrated. Audiomat amps sound like no other as they have a weight and low-end definition that I've never experienced before. I use an Audiomat Solfege Reference (6550) amp today at our vacation house and its special; 40 watts x 2 100% Class A magic.
Margules i-240 is another EL34 baed amp from Mexico that I've heard and will be next up for me but to be used with more efficient speakers. Just a beautiful amp in every way.
There are more but these are all real-world priced albeit not easy to get your hands on. Worth the hunt though. Just my experience.

