I'm not sure, so don't quote thia as the gospel, but from earlier posts on this subject, I was lead to believe that the EPX T-1's were completely discontinued and that anything out there for sale are just leftover stock from the run they made of them.
As far as I thought ( or heard ), no more would be made PERIOD, until they had worked out the problem they were having with them, and I have heard NOTHING about them making another run of them.
If it were me ( and it is because I also have an EPX T-1 ), I am going to assume that anything for sale now is from their original runs and that nothing has been resolved with them. Luckily I only use mine on rare occasions and have had no problems thus far.
Last I heard, Columbia was taking all actions necessary to replace damaged/cracking balls, but who know how long that will last?
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"TOO SOON THE POWER, TOO LATE THE WISDOM"