Didn't mean to be overly snide, but seems like everybody who's installing a tub just grabs up a 2x4 and a level and makes it work ala Terry Love, and many others, including me.
Now, if someone wants to make a useful product that plumbers would use, if someone would make a harness with a flat hook on it below waist level that would allow me to pick up a toilet bowl and put the weight on the harness by hooking the bottom lip of the bowl and carry the bowl across the yard and up a flight of stairs? I'll be your first customer. I'm no spring chicken, but I still have to work.
There's probably one out there already, but if not, it might be a nice product to put on the market.
Take some OSHA exec out for a three martini lunch and you're in. Every maintenance dept in every city, county, and school district in the country? That's a lot of sales.