Each of these 7 objects has a FUSE spectrum of realtively high qualtity. They can be seen here:
M33-OB-2-4
M33FUV-016
M33FUV-350
M33FUV-444
M33-OB21-108
NGC592
NGC604
All have realtively flat spectra, such that extrapolating from 1180 angstroms to the COS wavelengths is not unreasonable.
