You can find all the replacement parts you need at Escapa.
Specialized SWAT 2.0 Down Tube Cap Set for the spare down tube used on various mountain and Gravel bike models.
Features:
SWAT™ 2.0 down tube cap/door set used on various mountain and Gravel bike models.
Designed for SWAT™ 2.0-compatible frames.
Includes threaded inserts for mounting a bottle cage.
Bottle cage mounting screws not included.