IRTF Extended Spectral Library
IRTF Spectral Libraries Overview Spectral Library Extended Spectral Library
Tar files:
All Data   Spectra (Reddened FITS)   Spectra (Unreddened FITS)  Spectra (Reddened TXT)   Spectra (Unreddened TXT)

Reference:
IRTF Extended Spectral Library: Villaume, A., Conroy, C., Johnson, B., Rayner, J., Mann, A.W. and van Dokkum, P. 2017, ApJS, 230, 23

MILES ID refers to the MILES Library, Sanchez-Blazquez et al. (2006); project website.