Spencer 56-50 ammo

[norton]

What sources are there for 56-50 ammunition center fire for an original converted to center fire?  Might get into reloading someday but for now looking for ready made black powder.    Rather have new but did see a company called GAD Custom that lists reloads for 56-50. 
I have seen a difference stated about ammo for reproduction Spencers and original.  Any information is welcomed.
Thank you

[pakm]

Buffalo arms. it's about $3.00 each, but they have them
    cimarron had a few boxes too

[Deadeye Don]

http://tenxammo.com/files/Shooter_Direct_Pricing_01132012.pdf

About 2.80 per round. 

[Sir Charles deMouton-Black]

For the price of ONE BOX of factory rounds, you could get a LEE handpress and a set of CH4d dies. 

Why wait