My peanut allergic son (6.5yo) won't eat the sunbutter, it looks too much like peanut butter, and I think it scares him. I told him that it was sunflower seeds, but he just said no thank you. He's very very careful about his allergy-- asks before he eats anything, and just didn't feel comfortable with something that looked like peanut butter. I'm fine with that. But, at least everyone else in my family can eat it, and not be afraid that we will get him sick. DH and I LOVE LOVE LOVED peanut butter, but we threw it all out when DS was diagnosed. I'm also trying to get my youngest (not allergic) to try the sunbutter (but since he's never eaten peanut butter in his life, he's not interested, I keep offering it htough)-- just so when he goes to school, there is something I can put in his lunchbox. I'm not pushing my allergic son to eat it (he always brings yogurt in his lunchbox, so there's some protein, my little guy won't eat yogurt), but it's nice that the rest of us can have our pb&j fix, and not put my allergic son at risk.
And,I do understand your fear. There is a company in the US that buys nestle (I believe) candy bars from canada which have no cross contamination with peanuts--- kit kats and such. In the US there is cross contamination, those made for canada are made in factories without peanuts. Anyway, you can get on this website and order kit kats and I'm not sure what else. I won't do it, because I don't want my son to think if someone else offers him a kit kat--- I don't want him to think it's safe. Maybe when he's much older, but right now, I just don't feel comfortable with that---- so I do understand your concern.