Tabulated absorption spectra of greenhouse gases? Are there any free sources of tabulated absorption spectra of greenhouse gases from UV/Vis to far infrared (say 70 micrometers)?

This link shows the net absorption over the whole atmosphere (at least as far as I understand it), but I would be interested in the absorption by an infinitesimally small volume/distance. It would suffice to have the spectra for just one temperature, like $\pu{273K}$ or so.

On the NIST site I have found some information, for example IR spectrum of $\ce{H2O}$ vapor, but apart from the limited spectral window the spectrum is pretty useless for making a radiation simulation because concentration info was missing (as said in the disclaimer).

Is there still hope of getting accurate spectra suitable for understanding molecule specific greenhouse effects?
Contributing to the first half of the answer: The MPI-Mainz UV/VIS Spectral Atlas of Gaseous Molecules of Atmospheric Interest (public access here) allows you to search by chemical name, sum formula, CAS registry number, InChi key or author.

The output is a plot, annotated with the literature reference, e.g.



(reference)

It does not cover IR data to cover the second half of your question.  However, why not asking them if they in turn would know about a complementary database and letting the users of ChemSE know about their answer?

(Otherwise, if affilated with a research institution with a department of chemistry, knowing a chemical identifier like the CAS RN could help you to retrieve spectral data in Elsevier's Reaxys [rooted in Beilstein and Gmelin database], too.)