Unless they’ve used Hiscox cases, they may not have the definitive answer. But I’d definitely just call the shop and ask –
Beyond that, if the measures all look good to you, I’d order it from a place that’d let you return it if it doesn’t fit the way you’d like –
I know Eric Skye uses a Calton for his 00, and I’ve seen a 00 (not SCGC) fit nicely in a Visesnut case, but dealing with them has been pretty flaky. Beyond that, its not a size I have much experience with, at least in aftermarket cases –
Lots o’ SCGC guitars! But never ask which is my fav