Building my own DPSS yellow

Hi, I have been wanting a yellow laser for a long time and see that they are incredibly expensive. I know quite a bit about lasers and am well aware of the process used to sum frequency generate a yellow beam from IR as well as the R+G combined "yellow" lasers that some members on here have made. However, I was wondering what it would take to build a real yellow DPSS laser from scratch myself. I know I could get the high power IR diodes online, but how about the two crystals that I would need? Is this something I could realistically make at home? Please let me know if/how this could be done or if i'm just barking up the wrong tree.

Thanks!