Hey. I found a device tree for xolo play, it's Cyanogenmod and has been abandoned by the creator.
You can download it from there and use it as a base. I'll post the link below
Github . com/ ankur850/android_device_xolo_play
You'll have to yourself figure it out how to work around because I have no experience building roms.
As I too want a port rom for my Xolo Play and I found none so good till now, and then I saw your post which made me wanna help you
I'll be waiting for your rom though
would be glad to test it on my Play
A Potato told me to write this stuff.