The tricky thing with them is most all of their songs have backing vocals. I have the instrumentals, but not the backing vocals. .. and the choral backings are such a key part of so many songs. As the technology improves, I may be more able to isolate them and add them into the instrumentals. I just haven't been able to do it yet.
I had been unable to do more Florence for a long time because I could never isolate the choral backings on their tracks (The instrumental mixes don't include them) ... but recent advancements in isolation technology have been especially good at choral sounds ... so I need to revisit this artist. I'll be pretty busy this summer so I can't promise when, but I do have the tracks and know in my brain I need to get at them xD