Catalyst Audio have a couple of tube based modules: VCO, Noise Source, Mixer, Filter and VCA.
The VCO and noise source actually use tubes to create the sound rather than "warm them up".
The VCO has a pair of tubes, one for each side of the wave which gives some interesting configurations of waveforms, with wave folding and PWM, plus a feedback path that adds some unique resonant shapes.
The noise source has a number of noise sources, with the option to tune the noise to sound a little like a fiilterbank (to my ears).
The Mixer uses a tube to add drive at the output stage.
They are aiming to be ready to ship by Jan/Feb 2023 - price tbc.
https://www.catalystaudio.com/
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