Default Other OS Roms for NExus 7 2013 (flo)

Hello,

I just got my Nexus 7 2013 tow months ago and it currently have the stock android and 2 Ubuntu Touch installed though MultiRom. Now I'm really interested trying out other OS other than Android. I've tried FireFox OS but it's buggy. I tried to look for Tizen and Jolla no luck. I found linux ROMS like Plasma Active, Ubuntu Desktop 13.04 and Bodha?? but all I see is for Grouper only (Nexus 7 2012). Does anyone here knows sources of any other ROMS that can be installed in Nexus 7 2013 and also supports multirom? Thanks so much