Catalogues of H1 sources (hydrogen)
The THINGS survey is what you are looking for – research paper (web) can be seen below:
https://iopscience.iop.org/article/10.1088/0004-6256/136/6/2563/meta
Download above THINGS survey research paper in PDF format by clicking here:
This following covers a goodly chunk of the sky, out to +/- 400km/sec. This interface allows you to extract H1 profiles from the EBHIS, GASS, and the LAB survey. The profiles are generated on the fly using a weighted interpolation with a Gaussian kernel:
https://www.astro.uni-bonn.de/hisurvey/AllSky_profiles/index.php
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