The roadblock ended up being that I couldn't find a belt blank long enough to fit around me at the navel. I purchased a hand-made belt from the UK that used a splice to provide the length I needed, but I was advised that it probably wouldn't pass for the 501st.
I ended up purchasing from TiggWolf Creations. TiggWolf ended up taking a long time to fulfill the order, but in the end I received a very nice belt that fit me well.
I purchased some black police belt keepers to keep the excess tail of the belt in order.