You can find it online pretty easily. I know FRPGames.com has it. (And I can see their banner ad while I type this.) They sell it for $29.95 + S&H as of this writing.
I can't really recommend the program though, take a peek around this forum and you'll see what I mean. Generally it gets bad to mediocre reviews. Nor was I impressed when I tried it. They may eventually fix the problems, but Fluid has been very slow with patches (The only patch available is a beta release itself), and WOTC has been silent on the subject for several months.
There is however an unofficial E-Tools Helper program.
The Auld Grump