Try here.

Beware the duplicitous sign-up page.

When will they learn that trying to trick people into "signing up" for promotional material does them more harm than good?

I, for one, am far more likely to respond to a simple: "If you would agree to signing up to receive low-volume, no-obligation, promotional emails, it could greatly enhance our ability to continue producing our 'community edition' Perl".

In case of doubt, build one yourself with the -Dusethreads configuration option, i.e.

$ ./Configure -des -Dusethreads -Dprefix=...
$ make test
[download]

after having downloaded and unpacked the Perl sources. See also INSTALL.

...recompiling your Perl doesn't help you any.

Not necessarily true.  If you build a perl that's binary compatible with the perl that was originally used with the modules, you can for sure make use of existing XS modules — provided they do work in principle, i.e. their dependent libs are installed, etc. Otherwise, as any such libs will have to be installed anyway, trying to rebuild/install the modules alone wouldn't help you any.

Of course, the real question is why th OP didn't simply also copy over the perl binary that originally belonged to the modules...