Yes, replacement dampers are available for the 2017-2018 Sektor Silver RL A2. Dampers are Boost and non-Boost specific.
Boost:
11.4018.104.035 FORK DAMPER ASSEMBLY - CROWN RL (THREAD PITCH 0.8MM) 130-150MM (INCLUDES RIGHT SIDE INTERNALS) - (BOOST ONLY) SEKTOR SILVER A2 (2017+)/RECON RL A1-A2 (2018-2020)
11.4018.104.036 FORK DAMPER ASSEMBLY - REMOTE 10MM (2013+ PUSHLOC, ONELOC, TWISTLOC) MOCO RL (.8MM) 130-150MM (RIGHT SIDE INTERNALS)- (BOOST ONLY)SEKTOR SILVER A2 (2017+)/RECON RL A1-A2 (2018+)
Non-Boost:
11.4018.009.039 FORK DAMPER ASSEMBLY - REMOTE 17MM (POPLOC, PRE-2013 PUSHLOC) 80-140MM (INCLUDES RIGHT SIDE INTERNALS) - SEKTOR SILVER/XC32/RECON SILVER B1
11.4018.009.038 FORK DAMPER ASSEMBLY - CROWN TURNKEY 80-140MM (INCLUDES RIGHT SIDE INTERNALS) - SEKTOR SILVER/XC32/RECON SILVER B1
RockShox service kits and spare parts are best obtained through your local shop or dealer. See our dealer locator, below, to find a dealer near you. If no one is currently listed near you, then please search for local shops via your preferred web browser.
https://www.sram.com/en/dealer-locator
Manuals and additional information about RockShox and SRAM components can be found at our service site, linked below.
https://www.sram.com/en/service
Further questions?
Reach out to Rider Support by Asking A Question at the link below.
https://www.sram.com/en/rockshox/campaigns/rockshox-rider-support