This may get you started:


- [MatDL Pathway][1]
- [NIST SRD][2] ( I would write them)
- [Java Applet: Phase Transition Temperatures][3] (untested)

It is a very good question, which I came across as well. You could just google-image search `phase diagram` + `ELEMENT` to copy and past the most appealing charts into a table in your editor of choice.
If the intend is *personal use*, this might be the fastest route.

**wolfram alpha** should allow you to look up the state of the element at a given pressure as follows:

    sodium phase at 0 bar



Helium itself is a particularly interesting subject. 


  [1]: http://matdl.org/repository/
  [2]: http://www.nist.gov/srd/
  [3]: http://lectureonline.cl.msu.edu/~mmp/period/phase.htm