The only product I've been able to find locally are "Vegan Singles" slices
by Soymage.  They used to be called "Soy Singles" but recently change the
name.

The only problem I have with the product is that it tends to brown and the
edges and doesn't "appear" appetizing.  They have a strange texture as well,
but fortunately my son doesn't take notice of either.

Gail