I now have a copy working.
Don't hit it too hard please, I'm running it just off a computer in my basement...
http://aqua.empireirc.net/avantslash/avantify.cgi
And it turns out the code I originally had was one revision out of date for the 2.x series... So I'll attach 2.32 now.
It works. For now. :\
(When/if it stops working, tell me - I can
try to fix the code up myself for whatever /.'s changed, if the avantslash page isn't back by then...)