Toto Vespin Water Supply / other 14" options

After some research for a 14" rough-in toilet, I settled upon a Toto Vespin with a 14" Unifit adaptor. Now it turns out that the existing water supply would need to be moved in order to accommodate the Vespin.

The existing water supply originates from the floor, 6" to the left of the rough-in (center) line, 3" from the back wall. Toto spec sheeets show the water supply originating from the back wall.

Any recommendations on a water supply relocation that will take the least effort? For the Vespin (or other Toto models), must it originate from the back wall?

My other option is to find another toilet with 14" rough-in that accommodates the exisitng location of the water supply. What are the best options (either other Toto models or other brands)?

Thanks.

If you put the water supply in the floor, it will need to be moved farther to the left. The best bet is to get whatever toilet you will be using and measure off of that.

There are a number of toilets with a 14" option.
Most of the time, it's easier to use a 12" toilet and install a shelf or cabinet on the wall to hide the fact that there is a bigger gap back there.