1858 new model army spare cylinders

[coal]

I've been looking around for spare cylinders for my black powder remington revolver I got recently. from what I can tell from the markings it's a 1977 armi sport but I can't really find any cylinders for it. can I get a uberti cylinder or are there slight differences in manufacture I'd so of anyone knows where I can get spare cylinders lmk please

 

[Sorry Dude]

Dixie Gun works or Taylors maybe.