Australia

Found Sound

Europe

Acapulco Modular

BPro Audio Store

DV247

Elevator Sound

Martin Pas

Midi Amsterdam

Music Store

Mutan Monkey Instruments

Noise Kitchen

Juno Records

Raw Voltage

Rubadub

SchneidersLaden

Signal Sounds

Sound Of You

Canada

Moog Audio

Nightlife Electronics

China

Synthesis Minority

Japan

Beatsville

Takazudo Modular

United States

Analogue Haven

Detroit Modular

Perfect Circuit

ModularFreq

Noise Bug

(plz let me know about other retailers so I can include here)