Yes, replacement dampers are available for the 2016-2020 XC30 B1-B4. Replacement dampers are generation dependent.
B1-B2:
11.4018.009.071 FORK DAMPER ASSEMBLY - CROWN TURNKEY COIL 27.5/29 80/100 CROWN ADJUST, 1.0MM THREAD (INCLUDES RIGHT SIDE INTERNALS) - XC30 B1-B2 (2016-2017)
11.4018.009.072 FORK DAMPER ASSEMBLY - REMOTE 17MM (POPLOC, PRE-2013 PUSHLOC) TURNKEY COIL 27.5/29 80/100 (INCLUDES RIGHT SIDE INTERNALS) - XC30 B1
B3-B4:
11.4018.104.006 FORK DAMPER ASSEMBLY - CROWN TURNKEY COIL 27.5/29 80/100 CROWN ADJUST, 0.8MM THREAD (INCLUDES RIGHT SIDE INTERNALS) - XC30 B3-B4 (2018-2020)/JUDY TK B1 (2021)
11.4018.104.007 FORK DAMPER ASSEMBLY - REMOTE 17MM (POPLOC, PRE-2013 PUSHLOC) TURNKEY COIL, 0.8MM THREAD 27.5/29 80/100 (INCLUDES RIGHT SIDE INTERNALS) - XC30 B3-B4 (2018-2020)/JUDY
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