I really like the Output of Hideaway Studios but they have been a lot less prolific since collaborator Steve Howell (Hollow Sun) passed away. But here is a new release. Yes its a sampled synth, but Hideaway do them better than most.
 

The Polivoks (Rus.: Поливокс) was designed by Vladimir Kuzmin with input on the aesthetics from his wife Olimpiada who was apparently inspired by Soviet military radios of the time. In production between 1982 and 1990 the Polivoks was manufactured at the Formanta Radio Factory in Kachkanar, Russian SFSR. With a retail price upon release of 920 rubles around 100,000 Polivoks were manufactured – peaking at a production rate of up to 1,000 units a month! Despite this, the Polivoks is not all that commonly seen an instrument outside of Russia.

See https://hideawaystudio.wordpress.com/
$25 direct from Hideaway, or in the UK £19.25 including VAT.
 
Also available from Kontakt Hub £18.50 excluding VAT, so more expensive for UK residents https://www.kontakthub.com/product/Polivox/