nosler muzzle loader bullets??

[flyfish]

I took my first deer with a muzzle loader this Dec. I used a Nosler 260 grain sabot partion-HG bullet. I can't seem to find these bullets anywhere on the Nosler bullets page. Where can I get them? Do they make them anymore? I would really like some more. The Part No. on the package is 50261.

Any help or information is appreciated.