I received the SMA connectors from Hong Kong today and a couple of SMA male to SMA male RG316 cables. Shipping was relatively fast this time - only about 24 days.
The price for one cable was cheaper than the price for two connectors plus cable, so there is really no point in making them myself. Besides, these are just for testing purpose since I did not want to waste my hard pipe and semi-rigid cable for this.
The gold plating of the connectors does not have the same "feel" to it like good quality connectors from for example Suhner or Amphenol, but considering a price ratio of 1 to 8 and given the fact that I will not remove the connections once everything is installed, I guess I can live with it.