Ah, well it seems to still be there, but it seems that one may need to be registered to download it. However, I logged off and tried and I got a different message from the one that you got.
However, no problem, I am attaching the font here.
[Note of 2019-04-06 Saturday A new version of the font has been produced and I have replaced the first one with it. This is because I had not put a CANCEL TAG at the end of the substitution statement in the original font, so the substitution rule in the new font is as follows, with the CANCEL TAG uE007F added.]
In order to try the experiment one needs to install the font.
So here is the sequence that one needs to enter in order to cause the display of the (stylized) glyph that represents the white crested tiger heron in these experiments.