The Honda A01 is not discontinued. Honda always has more than one supplier for parts, so you just don't know what your local dealer will get in. A and H says that they are only selling the A01 currently.
But I don't like the dinky size of the "newer" filters as compared to the first several years we owned our 1997 CRV.
I purchase the 15400-PCX-004 made for the s2000 for our CRV. Same size as original, with a much higher burst pressure.
Overkill? Of course. Peace of mind for the past 305,000 miles? Absolutely.