I use a laptop stand that has holes that I can mount a vesa plate through. I saw this solution I think on this site somewhere, and you could use it just by itself if you don’t want to do any DIY.
I did add some work to it myself though. Crappy rendition of how I set it up is below. I needed to elevate the base with a wooden plank so I could get enough clearance for my body and be comfortable, without drastically changing the stroke angle. I also throw a blanket over the whole thing, with a support clipped to the top of the stand and another point of support (I’m using a stack of home depot buckets just because it happened to work well and I’ve not bothered to replace it with something less ridiculous) behind the whole thing.
I tried a number of other solutions using regular monitor stands etc but I just couldn’t get them to stay stable with the blanket thrown over, which is why I went to this. I’ve been very happy with the setup, I can lie down comfortably, and with the blanket thrown over it I hear nothing and it’s completely stable. It did take a while to figure out exactly where to mount the OSR and the angles for everything, but now I can set up the whole thing in about 3 minutes.
The stand I use: