Butter / Margarine Issues

I am trying hard to find a butter substitute that both my son and I can eat.

I cannot eat any that have dairy in them which leaves out anything that contains butter plus many margarines that contain dairy. He cannot eat the soy which leaves out many of the margarines as the main ingredient is soybean oil.

I got excited when I saw Canola Harvest because it is made with canola oil instead of soybean oil but it turned out to have whey(milk) in it.

Then I got excited when I saw Spectrum but it has soy protein isolate in it.

I already have real butter for him to eat, so I bought some Earth Balance for me to eat. We just won't be eating the same things for now, but I hope to find something that works.