parabolaiso has not seen upstream since 2013
upstream has since dropped support for i686
the archlinux32 fork 'archiso32' still supports dual-arch and is actively maintained

https://github.com/archlinux32/archiso32

note that this is only a 'wish' item for IFF an upgrade should be necessary - merging with either upstream will most likely be painful at this point - there are significant parabola customizations now and it is working quite well as is