Hornady may have discontinued their Hornady 230 gr FMJ FP as it is not listed even on the Hornady Web Site. I suspect if you can find them retail, they will be N.O.S.
As an alternative, Nosler does make and sell an equivalent for about $.24 each
All that having been said, regular FMJs are good plinking rounds as well and much easier to find than the FMJ FP.
Beleive it or not, I like the 225gr FTX for plinking. Find them on sale or when Midway has their bulk sale and they can be as cheap as 230 FMJs. My experience with them has been more accurate than the 230 FMJ, but I can only speak for myself.
They are $.27 each here:
http://www.manventureoutpost.com/products/Hornady-45218-Fle-Tip-45Cal-452-225gr-%28Per-100%29.htmlHoot