UPDATE: We now have the TRS-A to TRS-B dongle, applicable on any length TRS cable
A shielded 1m TRS-A to TRS-B cable, flips MIDI TRS-A standard (E.g. Korg, RK006) to TRS-B (for e.g. Arturia and older Novation products).
For a regular TRS-A to TRS-A cable (also for audio or patching), check out this cable.