Can SD handle non-square textures (1:2 ratio) and how can I set up my graph?

Hi, 

I'm on Windows 10 and my SD is the 11.2.2 (the 11.3 is downloaded and being installed as I write)

I'm making a bark texture and I need it to be 1:2 ration (e.g. 2048 px width and 4096 px height). 

I set up my graph with 2k x 4k resolution, thinking that was how it was done. However, I realised quickly that the 3D view was displaying incorrectly: stretching the width of my texture to make its ratio 1:1 and tile it once on both the u and v axis of the UVs. I thought there would be an option to change the tiling settings in the parameters of the 3D view, but didn't find one that would let me have a different tiling number on the u and v axis. 

During my search, I also realised that actually, my 2k x 4k texture was just a 2k x 2k texture repeated twice vertically. My tile random node just repeated the same pattern 2 times vertically.

Is it possible to create a 1:2 texture within Substance Designer (with no repetition of the v axis)? If yes, how do I do it?

Any help is appreciated, 

Thank you and have a good day.