Re online vendor:
https://www.gasgaspartsguy.com/ if you are in the USA (i would contact them if they don't list the kit you need as the online shop is new and they might not have everything up yet)
http://www.motocrosscenter.com/ In Spain
https://www.greenlandmx.com/en/oemparts In Spain
http://www.enduropuro.it/ In Italy
There was another one in Deutschland witch I can't remember at the moment, and same for UK.