This is the pump we use
We bought it a few years back and according to the receipt we paid $169.99 buying local at a marine store.
I don't think I have any pictures of the hookup although our shower looks a lot like yours except yours looks a bit bigger than ours. (4'x4') I'll try (again) to remember to take some picks of it this year on playa or maybe when we start taking everything out of storage and start testing pre-burn.
Oh, and ours is shorter. We have a two room yurt, one with standard 4' walls which is for sleeping only (and it has AC

) the other has 6' walls, so we adjusted the height to fit inside that yurt. The nicest thing about the setup is you can take a hot shower any time day or night.
You just have to be careful to monitor your usage. Especially if you use an evap pond, or you'll be chasing down one of those pump trucks out there.