Best bet now is to buy some off of a shooter--there's not much left in retail. You also might try Ron Hoehn. He's got a few cases left of the old Multimatch Ultra, which shoots just as well as the Midas. Good luck.
I was just on the phone with Ron, ordering a case of the old Multi Match and asked him about this. He said there is none and the only place you will find it is in somebody's safe. Those that have it treasure it and will likely not part with any.