Good luck, I hope that works for you.
You might look for an old Parker Maxxfly or Dragonfly. Pickups like a Strat but only about 5 pounds if you find a DF (not PDF) version.
The neck is nice, and they stay in tune well, too.
I wouldn't go for the other models of the fly. The DF models are made of wood without the carbon fiber exoskeleton. Since Parker went out of business, parts for the carbon fiber ones are scarce.
The one on the left is a standard DF, and the one on the right I had made in the custom shop with Duncan P-Rail pickups.
If worse comes to worst, you might reconsider trying the diet.
I started getting the big bursitis pain in the late 1980s. I've been pain free ever since.
Notes ♫