Data for spectrum of Wolf-Rayet stars
If you know how to reduce raw spectrum data, you may look at the official archives of big observatories (ESO, MAST, CADC). But a quicker and much easier way could be to use the following portal:

http://archive.eso.org/scienceportal/home

Typing the name of some Wolf Rayet stars will lead you to reduced data and thus spectra.