thats going to be a tough one. Hard to see on my phone , but did they not connect the inner wheel tub with the outer 1/4 after trimming them up? wtf lol
What I would do, and certainly not the "right" way of doing it but it's going to be far easier and cheaper than the "right" way (replacing both 1/4's), is to take your wheel well trim, locate them where you want them to be/where you think they should go and then just cut out some sheet metal pieces rebuild the entire pinch molding area. Going to take a lot of time eyeballing, measuring, cutting, tacking and mocking it up but it should work. As far as getting it perfect, it's really going to be on you to figure out where the trim is supposed to be sitting in regards to the rest of the body. would definitely help to have another B body around to measure and use for reference while doing it.
You could also cut the pinch area off of two other donor 1/4's so you don't have to make it yourself, that might save a lot of time fabricating up the pieces but you'll still have to locate everything correctly. Should still be much easier, but you'll have to find two complete 1/4s then (and may question why not just replace the whole 1/4 and make patch pieces just to tie it back in to the tub area the)