Available as an assembled Module and as a DIY project.
This Module is currently available.
Roland 100M VCO based module for MU
Based on the Roland System 100M VCO, with onboard FM/PWM LFO borrowed from the MC202.
https://frequencycentral.co.uk/product/system-x-oscillator-mu/
These merchants probably sell this module. Huh?
Frequency Central System X Oscillator