Supplementary coadded HST/COS spectra that were processed by three different programs other than the CalCOS (version 3.0). The three codes applied are (1) an IDL routine x1d coadd.pro by Danforth et al. (2010), (2) a spectral co-add code by Wakker et al. (2015), and (3) the PyCOS pipeline by Liang & Chen (2014; & private communication). The spectra of one of the targets, M33-FUV-016, are shown in Appendix B in the Corresponding paper.