Iver Johnson was a low end manufacturer until about 1970 or so. The made low price, read cheap, hand guns. I remember in 1962, when I was stationed at Ft. Devens, MA., I went over to Fitchburg to see their factory. Nice people but low budget firearms,
If you bought this 44wcf, the likely hood of your ever finding parts range from slim to none. And truth be told, I really would not even fire it.
If you want a Single Action, buy an Ubert iimport from Cimarron or Taylors INC. Pretty good pistolas for the money.