You think that one of the DD T's:
http://www.petrastechshop.com/dadendet.html

And two of these guy's:
http://www.petrastechshop.com/dadenmatomag.html

Might work?

The DD T is 31mm in length (without barbs), not sure how thick those male/male fittings are....

But it COULD work.... it might be worth a try.

Edit:
Naekuh don't you have a couple of the male/male fittings?