I am sure you know about the wall mounting plate, which does look good if it is not too high and the mains/power cord can be hidden.
There have been some aftermarket stand products for the Beosound 1 in Germany over the years. Fabricated in glass and stainless steel, they might be found today on EBAY now and then.
The comments about the height of a stand pole and an increase of the OD and ID of the pole are well founded. The corresponding base of such a product would also need to be wider and heavier.
My experience is that mounting the BS 1 too high, and it only sounds good if one is standing.