Don't have a Hack Attack, but have an ATEC Casey Pro for sale. If you don't get any responses/luck finding a HA then please PM me and see if we can make a deal.
Much appreciated. I actually have an Atec Casey Pro and Iron Mike in backyard batting cage (crazy, right??)...I like what I've read about Hack Attack and I'm looking for a used one...if I locate it, there will be another Atec and Iron Mike on ebay and Craigslist :-)