I believe the correct PN is 710006576. The original PN was 710005427 but is listed as changed to the former by Cheap Cycle Parts. CCP also lists the part as specifically for the 2018 F3 Ltd, amongst other F3s. PN 710008091 is listed by CCP as for MY 2020 and 2021 F3s. Send this post, along with a complete, polite litany of the BS you are getting from the dealership to brpcare@brp.com and ask them to get off their backsides and get a WARRANTY part, 710006576, for your Spyder from CCP, who has it in stock. Last step, find a new dealership.