Halloween // Berries and cream Little Lad costume jacket

I'm trying to put together a costume to be the Little Lad from the Starburst berries and cream commercial for Halloween and I've got every other element sorted, but I can't find a jacket that looks remotely similar to the jacket he wears.

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Probably the best view of his jacket I can find. The lower part goes a bit below his hips and has two pockets.

Does anyone know of a relatively inexpensive jacket like this? Button down, with two pockets, and a little bit long? The collar and cuffs I can add myself, but I don't have the sewing knowledge to be able to make the whole thing from scratch, otherwise I would.

He wears a grey jacket but I'm also good with it being black if someone knows of one. Anything helps, I've been searching for days and couldn't find anything.