Call VTI - though you might email
they are Uberti's USA parts distributer .
The hardest part is drilling out the lock pin
VTI Replica Gun Parts
PO Box 509
Lakeville CT 06039
USA
Phone -860-435-8068
Fax -860-435-8146
Email - mail@vtigunparts.com
UB:070021
Uberti Base Pin (1862, 1848, 1849)
Price
$23.50
you will also need the lock pin
UB:070028
Uberti Cylinder Lock Pin (1862, 1848, 1849)
$2.95
Granted it will cost you some "live & learn money"
we've all been there
but if you don't repair it all you have have is a 3 piece $329.00 paper weight
good luck ...one of the gun plumbers here may help you out ....a particular old, cranky one of my acquaintance if he isn't to far retired
comes to mind ....