Hi,
which company makes a kickstand like the one you can see at this link

http://www.gialdini.com/catalogo/bicicletta/bici_2.htm

thanks

since those mini kickstands are used on Koga Miyata trekking bikes it´ll the best you just ask their world touring test rider Tilmann Waldthaler on www.tilmann.com or you may look at www.koga.com
Aku

... or You fix a normal rear-kickstand at the lowrider and cut it to the size You need.

... and then You are fix fertig.

Wolfrad

here what Tilmann wrote me:

Hello Nicolas,
the Kickstand I have has been designed for Koga Bikes
and is only available with Koga bikes. It is not available
on the market. Have a nice trip in Africa.
It is a nice place to cycle I have been in Africa for 5 years
and have had very bad experiences. Holdups and Revolutions,
but I still like the place very much. People are fantastic.
Have fun and thanks for visiting my homepage
Tilmann

so you may go the way Wolfrad indicated: take a standard kickstand, fabricate a mounting plate to the low rider rack and cut the kickstand to the required length.
Good luck and enjoy your trip
Aku