It took awhile, but I think you are referring to a 38 Double Action, 2nd Model?? It is confusing when there was a Model 2 tip-up 32 rimfire before the 38 DA top-break. It is less confusing to collectors to use the more common term of double action. The 38 Double Action, 2nd Model was made from 1880 to 1882 in serial number range 31-22,172 so not many of this model made. The mechanism is different than any other model of 38 DA, so you will have to locate a part that will fit correctly, but I am not sure if the trigger spring is the same on a 2nd and later models?

Are you looking for a "Y" shaped spring? They are often made from spring steel stock and not too hard to do it yourself if you have a pattern. There are several Youtube videos on how to fabricate flat springs and that may be your best bet.

You might also put an ad in the Wanted to Buy section here in case one of the members might have the part you need, but there are few online sites that would have such a part. You might check out Jack First since they do manufacture some parts for vintage guns.

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Gary
SWCA 2515