Become self-sufficient! All of Swig is open source and available on GitHub at paularmstrong/swig. Just clone the repo, check out the tag of your desired version, and build, review, and change to your liking!
$ git clone git@github.com:paularmstrong/swig.git
$ cd swig
Every Swig version that has been published has a corresponding Git tag.
$ git tag --list
$ git checkout v0.14.0
$ make
The target available sometimes change from version to version, so it's a good idea to review what's available.
$ make -pn | perl -F: -ane 'print "$F[0]\n" if /^\w+\s*:/' | sort