My feet are slightly different sizes (1 size different).  I was told
"they" sell molded toe filler thingies to fill out the front of a shoe
(i am interested for my snowboard boots) but I can't find
anything because i can't think of what it would be called?  So, what
is this called and can you find a link or two to an online merchant
selling them?

I couldn't find anything online except references to custom-made
orthotic inserts, which cost plenty. An old friend of mine had a
similar problem, and he used to pack wool fleece into the toe of the
larger boot.