OUCH!!!! Hope you heal quickly!
As to parts... Some are still available from Victory, some not; If you're willing to do some digging, though, you should be able to find whatever you need.
Mirrors - the thread is a standard metric thread; if you want something different from the OEM mirrors, there's a wide selection out there of ones intended for other metric bikes with the same thread.
Crash bars - OEM ones may be difficult; you can find Lindby bars on eBay pretty easily.
Windshield - Don't know if still available from Vic, but you should be able to get an aftermarket one without too much difficulty (I'd try Memphis Fats first).
For other items NLA from Victory, keep an eye on eBay, the For Sale forums of the various Victory-oriented websites, even CraigsList.
'99 V92C with K&N, PMRT chip, Vic stage 1 slipons, and engine by Rylan Vos!