Can you get a fresh stay and do a more creative bend that creeps around the caliper and ends up where it would be if there was no caliper, and then approaches the stay bracket on the same path that the DS does? Then there shouldn’t be any asymmetry.
It will be a royal pain to do all the bends though.
Berthoud 60mm are 26" or reshaped 700’s. The 650b are only available in 40mm and 50mm. You can do quite a bit of manipulation to make them work for your needs, though.
*I just saw you were using SKS. I love plastic shelled fenders, but they have a whole lot less ability to be shaped to your needs. Very often the pop from the mold with some twist, as well.
The bendy stay trick might still work. Certainly if you toss on Berthoud/ Honjo/ VO style struts.
fender Q: I have a Trek Steel District and by “a comedy of errors” (i.e. I think my dad ran them over or they flew out of the bed of the truck or something when he was having my bikes boxed) I no longer have the stock fenders. Recommend me black metal fenders for 700 x mid-30s? The catch is that they have to attach to that mid-fork boss and idk what to look for to make sure that can happen. Bonus if they’re available through Q
Alternately if anybody has access to dexter and can see if spare fenders are available that would be rad, but the bike’s old enough that I doubt that’s an option.
cookietruck was right on the solution, find a shorter brake nut - your local shop should have a bizillion of them. The daruma isn’t supposed to go over the nut.