Also looking for extension cables. Are there any for the antenna?

2 cables are supplied, approx. 1.5 m long.

Wittenberg antenna extension cable for WLAN antennas, SMA reversed socket to SMA reversed plug 3m,cable RG 174 (extension cable)

I would like to throw the question out into the round again. I am also looking for an extension cable.
Does anyone have any ideas?