Just to be clear, you can or can not operate a conventional push-button inflator with your right hand?
If you can, many of them with top right dump valves can be fairly easily converted by simply unscrewing the inflator at the shoulder and swapping it. On the inflator end cut the cable ties, rotate it 180
o or whatever is comfortable for you and re-secure.
Check with your dealer but I believe this is possible on the Balance, Wave and Pro HD.
Some of Zeagle's line also. One advantage for you possibly is that Zeagle has a pull dump integrated into the inflator itself, so simply pulling down on the inflator assembly vents air - no need to push the exhaust button. If you switched it, you'd have to work out something for the right side pull dump cord when moved left as currently it rides in a small channel.
IDK about the new ones but on mine the velcro securing the inflator hoses is removable. So you could have it sewn on the right side. Or add a second one and use the original to control the pull dump cord on the right side.
I believe in their line only the Ranger or the new Halo - a jacket model - have the top right pull-dump. I dive/recommend the Ranger often.
A further advantage possibly is that the two Zeagle's also use their ripcord weight system - it's the red handle seen mounted to the BC on the lower right side. A single pull dumps both front weight pockets. The one time I pulled mine to test it, I used my right hand. To hand up your weights, there are zippers on top of each pocket - the provided/optional weight bags contain any weight per pocket and have a long fat handle.
I would contact someone in their forum here or at the factory also. A few years ago a veteran posted asking about a custom BC since he'd lost complete use of his left arm - they were able to configure a BC for him operable with his right.
Home - Zeagle Systems
I3's or the Mares system only mount on the left since they're replacing a standard inflator. I don't believe it's possible to switch since the mounting plate is integral in the jacket and the linkages run down that side to operate the dump valves.
Also talk to Tobin at Deep Sea Supply (DSS) - they have their own mfr's forum here. Many of their wings mount the inflator connection exactly in the center of the wing so should be able to route down the right side also. It is a backplate/wing design so with the right tuning using the same tank, you wouldn't have any dumpable weight - or the need to do so as the rig is always balanced. In higher buoyancy situations they sell bolt-on weight plates as an option.
https://www.deepseasupply.com/index.php?category=wings
hth, you might look at other mfr's lines also to see if they have a right shoulder pull dump, those should be possible to be converted also. One possible issue might be to check that the bladder mount for the inflator is the same on either side - some might be lighter weight since they don't expect most people to swap.