Just order a Pietta SAA bolt spring ....
Code
SAA5287
SAA5287 Description
Pietta Trigger Bolt Spring (1873 SA, AWA, ASM, Colt 1st & 2nd)
get the screw too ....
SAA5517
SAA5517 Description
Pietta Trigger Spring Screw (1873 SA, AWA, ASM, Colt 1st & 2nd)
Price
US $3.95
or
SAA5510/IX
SAA5510/IX Description
Pietta Trigger Spring Screw Stainless (1873 SA, GWII)
Price
US $5.95
VTI Replica Gun Parts
Address PO Box 509
Lakeville CT 06039
USA
Phone 860-435-8068
Fax 860-435-8146
Email mail@vtigunparts.com
EDIT: sorry I had to get to my home computer to post the part # (work computer has block on Firearms related sites ) Not Cas City thankfully ...
You say the gun " It's roughly 2 years old "
I doubt, you'll get any help after 2 years ... the parts are cheap , go that route