There are many threads about left side damage and they almost all get into shifter woes. Here are some OEM costs.
The shifter arm is about $140 new. Likely you sheared the 6mm pin bolt, because it is designed to do that. Aout $12, save the rubber.
If you have bent the shaft, then a new one is about $116.
Case removal necessitates a gasket. Figure $25 for gasket and some supplies. if you have a cycle shop do this, I am not sure how many hours, but it is a pretty simple operation if you can get to the e-clip without removing the whole clutch. Hopefully less than 3 hours labor. $300 maybe.
Replace the shaft seal for a few dollars too. Worth it for sure.
Even if you needed a new polished cover at $320, you are still well under that scary $1200 dledinger threw out.
Forchetto has a thread on $12-$20 shift levers that work from Hondas. very helpful guy he is.
Love the wind
03 T100 Lucifer Orange and Silver