I would love a RMC x Evisu Collab, but I dought it will ever happen, there is too much competition between the brands and for me the collab would have to be made of RMC denim as I feel its superior, but I am sure Evisu wouldnt see it that way.
A half and half is an interesting idea, I guess if you were handy with a sewing machine then you could make some yourself if you have the courage to destroy a complete RMC to get the donor parts.