@wpwrack,

Thanks. It worked, with a few minor issues.

(1) syntax is "./localize <folder> < input > output"
(2) requires GNU-awk (-e). mawk worked but always gave a warning about -e

It went through quite quickly and downloaded 68 files (87MB). All of them PDF (but 4 of them didn't get a .pdf extension).

I'll keep my cache in case it becomes necessary.