Been tossing ideas around about building a custom shower/toilet combo pan.
After doing some digging, I found that you can get stainless replacement dog kennel trays in all sorts of sizes that might work really well... and are relatively cheap.
Thoughts on using something like this? You'd need to run the wall liner down inside the tray and seal it up... could even raise a portion of the tray and taper the bottom a bit easily enough when you install the drain.
Anyways.. open to other ideas. Not really wanting to spend $400+ on a shower/toilet combo pan.