Sportsmans has them.

Like I said I am very happy, 1" groups not a problem once you find the right powder charge. I havent tried the other bullet weights or calibers. A friend told me to try the .44 cal bullets with my 1/28 twist gun. He shoots the .44/50 260grn with a 130grn 777 FFG charge out of a knight 1/28 twist inline and got the same results as I did. He has tried the .45/50 340grn and .44/50 300grn with excellent results as well. He has been shooting the orange tip "Dead Center" but I found that the blue tip "QT" shoot just as good. ]

When I worked a load with the bullet I started at 100grn 777 and then went to 110grn 777, I was getting 1" groups as 50 yrds. I went to 120grn 777 and started getting one hole 3 shot groups as 50 yrds. I was happy with that.