EDIT: This is Daetrin. The draft CRL can be found here:
https://origin-wiki.501st.com/databank/Costuming:TK_rogue_one
Rather than keeping both places updated, I'm just updating the one on the wiki.
NOTE! This is *NOT APPROVED*. Until photos are added & the CRL is signed off by the LMO, it is not yet an approvable costume.
Sadly I haven’t found one.
But, nor have I found anything that suggests that it is 2 piece either, I’m guessing this (like a lot of other details) was just copied over from the ANH stunt crl?
Given that the shoretroopers, Tank Troopers and (I think) FO TKs were all made by the same teams and all have the ab / kidney plate as one piece it seems to me far more likely that they’d have done the same for this costume.