Hi Jack,
JC great work with the pic, last time I had a similar fix I enlarged the image on a photo copier to fit and roughed one out using that as a pattern (it was not a spring). Jack doubt you need it but i recorded my dissassembly and reassembly procedures a long time ago:
I have made the stock repairs to my ideal and have successfully reassembled her. I will describe very easy instructions below.
To disassemble remove barrels, then remove all screws (2 top tang, 1 lower bottom short tang,and bottom trigger plate). After removal of screws place thumb with pressure on top tang (to keep it from pushing upward) and retract lever that cocks and opens the action. With lever fully retracted remove trigger plate (down & rearward) gently release lever, tilt action downward (top tang upward) and remove.
Watch for v spring that is between top tang and lever (used to push lever downward when hammers are cocked) note that the v spring short leg is up and the longer leg is under the lever arm. Mine did fall out when the action was removed. To reassemble just go in reverse. Is actually very simple to do and the action is quite interesting to look at and appears very strong to me.
Jeff G.