Jersey Mikes does and they’re pretty good.

The Italian Store in Arlington makes them - we ordered one years ago and it was a hit (transporting the 6 foot sub was comical however...)

Vaci makes them though I've never had one.

I haven't been in a while but A Litteri, the Italian shop in by Union Market (like the OG Union Market) had these and they were a favorite among foodie friends.

I realize that Christmas day is mostly a snack holiday for us (the big meal is the night before). I'd love to order super long sub sandwiches ahead of time. Does anyone make these, apart from Subway? Love any recommendations.