I have built RPM of pd-extended (0.42.5 from SVN) for ALT Linux recently. It is available through standard apt-get/synaptic or from http://www.sisyphus.ru/en/srpm/Sisyphus/pd/get though I don't think it will work and even install on other distributions but ALT Linux.

You can also check my git I build RPM from if interested: http://git.altlinux.org/people/erthad/packages/pd-extended.git