I think the Sputnik modules are not made anymore, and they may be hard to find, especially the Dual Oscillator.
The Quad VCF/VCA appears to still be in stock at Matttechmodular.co.uk
I think the Sputnik modules are not made anymore, and they may be hard to find, especially the Dual Oscillator.
The Quad VCF/VCA appears to still be in stock at Matttechmodular.co.uk