Sorry to hear about your troubles with the conversion cylinder...
Until you do get reloading equipment, you might check out Freedom Munitions, as I just bought 250 rds of 255gr range ammo for $147 (before shipping)
My LGS has cowboy load 45 for $35 per 50 (ouch...)
I am literally going to get 45 dies and bullets today!
Keep us posted on the Taylor & Co work on your 1858.
When two of equal skill meet at swords' point, there is no conclusion to the match--Takuan Soho (written in 1629)