Try posting a WTB ad both here and on ChipTalk. Daily checks of eBay listings and craigslist ads across the country probably worth a try too.
The chips (and company) have long been gone, and I don't know a single person who has a set. I think I have ~one~ sample chip laying around somewhere. Best of luck to you in your quest, but I wouldn't hold out much hope for adding on at this point.
I actually won a set of these years ago in a contest via Bluff Magazine. They did a fantasy poker thing (kinda like fantasy football, where you pick players and then their results earn you points, etc)
I came in 2nd (first place in the contest was admission to a Howard Lederer Poker Boot Camp, lol!) and won the set of All-in Chips. I remember they had like this rubbery sort of coating on the outside that gave them a nicer feel than standard dice chips. I don't have them anymore though, sold them ages ago.