I have a brand new in the package Surefire XT07 tail cap switch assembly for the X200, 300 and 400 light. Will sell for $135obo shipped to lower 48. No paypal. Check or money order only. IM with any questions.
https://www.surefire.com/products/flashlight-accessories/switches/xt07/
https://www.surefire.com/products/flashlight-accessories/switches/xt07/