@Robert_Panzer specializes in certain old world regions at good prices, including some hard-to-find wines (as the OP demonstrates) in Burgundy and Champagne. You can see a lot of his producers (not all) at his website https://downtoearthwines.net/.
I’m not spending $20K+ a year like Dentice… but I’ll tell you what I buy from him. For many of the below, Robert is consistently the most complete source at the best price:
Germany
Mosel
- Max Ferd. Richter
- Günther Steinmetz
- Loersch
- Clemens Busch
Nahe
- Schäfer-Fröhlich
Spain
Getariako Txakolina
- Urkizahar
Ribeira Sacra
- Guímaro
Bierzo
- Castro Ventosa
Canary Islands
- Envínate (*This one I did not get allocated.)
Cava
- Pere Mata (try the L’Origen - I don’t recall where I first tried it but it’s a QPR superstar – labeling could better distinguish dosage though)
France
Burgundy
- Jean Javillier
- Gilles Lafouge
- Charles (Cyril) Audoin
- Pattes Loup
Champagne
- Marie Courtin
- Larmandier-Bernier
- Laherte Frères
- Cedric Bouchard (maybe LOL)
and Eric Bordelet Normandy Ciders
Italy
Alto Piemonte
- Le Piane
Other interesting stuff I haven’t bought (from him) but many like includes:
- Mugneret Gibourg
- Michel Rebourgeon
- Clusel Roch
- Markus Molitor
- Dr H Thanisch
- JJ Prüm
- Wagner Stempel
- Rings
- Baudry
- Benoît Marguet
- Benoit Déhu
- Suenen
And about a dozen+ more