I searched for a long time for a suitable and simple stand, like the one in the Samsung product pictures, but found nothing. Then I took the stands from Flexson for the Sonos Play 1:
Flexson Sonos PLAY:1 Foot Stand, Pair (Black)
However, you have to extend the bracket for the speakers so that they can be screwed on. Weld the steel plate, drill a hole for the screw, break the edges, paint black matt. If necessary, cover with heat-shrink tubing or felt tape.
The Samsung power cable also fits into the integrated cable guide. If you need to extend the cable, you can use the Flexson extension cable for the Sonos Play 1, everything fits perfectly.