Portable Handbag Carrying Case for TEENAGE ENGINEERING OP 1 Digital Synthesizer Protection Sleeve Storage Box Hard Shell|Mice & Keyboards Accessories| - AliExpress
OP-1 Accessories - Strap Kit (black), N.O.S. – Big City Music
5 Tips & Tricks for the Teenage Engineering OP-1 - from UK distributor Sound Technology Ltd
Teenage Engineering: Opbox Sensors and Shoes, OP-1 Drums and MIDI Sync - CDM Create Digital Music