First of all, if it's marked ".32 LONG", it's chambered in
.32 S&W Long rather than .32-20 WCF aka .32-20 Winchester. The .32-20 Hand Ejector was built on the larger K frame rather than the compact I frame, and the barrel was marked ".32 WINCHESTER CTG.", ".32 WIN. CTG.", or ".32 W.C.F. CTG." depending on when the revolver was made.
If the gun is correctly identified as a .32 Long I frame, its serial number reveals it to be a
.32 Hand Ejector Model of 1905, 5th Change.
I suspect your gun actually has a 3-1/4" barrel; revolver barrels are measured to the cylinder face, not to the barrel-frame interface. Novices commonly measure them incorrectly and under-report S&W barrel lengths by ~3/4".
2-1/2" was not a standard length; if it's truly this long measured to the cylinder face, it's likely that the barrel has been cut.
This gun most likely came with black gutta percha (hard rubber) checkered grips with molded S&W logos. It
might have come with checkered walnut stocks with a convex circular area at the top, but this was not common on pre-1917 I frames. The top of the wood stocks would be tapered, not flared like the commonplace postwar "Magna" stocks.
The hard rubber stocks are difficult to find in good condition because they tend to disintegrate during removal from the gun; however, sets are out there if you watch GB long enough.
IIRC S&W offered genuine mother-of-pearl stocks as a factory special-order item during this time period, but genuine factory MOP stocks in good condition sell in the upper 3-figure range- more than most .32 Long I frames themselves will fetch.
If you're not looking for historically accurate replacements, this gun will accept any round-butt grips or stocks intended for the "short" grip frame used on I and J frames until 1952. Later I or J frame grips can be physically mounted on the gun, but they will overhang the butt by ~1/4".