Yes, the replacement air spring assembly for the 2021-2024 35 Silver R/TK A1 is part number 11.4018.103.008 (FORK SPRING SOLO AIR ASSEMBLY - 100-160MM (INCLUDES TOP CAP, SOLO AIR SPRING, TRAVEL SPACERS & SHAFT BOLT) - 35S A1 (2021-2024)).
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