Child seat for Lectric XP bike

[EbikeBoy]

I am looking for a child seat that would fit the rear carrier on my Lectric XP bike. The carriers that I have seen, appear to be to narrow to fit the 7" wide carrier; they are made for a regular bicycle. At this point, I am considering making one, probably mostly from wood. But, if I can find something suitable, I'll save myself another project. Wonder what others might have done in this regard? Thanks for reading and responding. EbikeBoy