Were you looking to buy or print?
I found out about David Manley's ACW builds after his interview on Yarkshire Gamer podcast; there are dozens of stls for Confederate and Union ships in 1/600 and 1/1200 up on Wargame Vault under Long Face Games.
I cannot speak to the quality of the prints (still too far behind in projects to start a new one) but he does have a pretty expansive range.