Our archivist @ally posts many kernels to archive.org.
See: https://archive.org/download/Puppy_Linux_Huge-Kernels
Some kernel sources & headers are here:
https://archive.org/download/Puppy_Linux_Kernels
Use at own risk.
WARNING:-
OLD KERNELS & FDRVS SHOULD NOT BE USED WITH WOOF-CE PUPPIES CREATED AFTER 2022.
STRUCTURAL CHANGES WILL LIKELY CAUSE CORRUPTION.