That tool is a MUST HAVE IMHO. I bought mine from Honda in 1987 and haven't destroyed a ball joint or dust boot since. If I recall, it's made by Mac tools, but I don't see it in Mac's 2006 catalog. You could probably order it from your local dealer. It's pricey (about $100 when I got mine), but invaluable for those really stubborned joints!

Spray that joint with Liquid Wrence, 1-2 turns on the tool with a 19mm and a good whack with a BFH and the joint comes right apart.

P.S. - Do NOT use a pickle fork to separate the joint... you're pretty much guaranteed to either squeeze all the grease out of the joint or, worse yet, tear the rubber boot.

Good luck !