You could check local newspapers in their "classified" section. Could be under "warehouses for rent", or something to that effect. Some of the "warehouse bays" type only have spaces for rent and a community bathroom. Some are for storage only. You have to figure out how much space you really need and then start your search. Some factors you might keep in mind:
Actual available working space.
Type and size of bay/entry door.
Is there a back door (in case of a problem).
Access to the space (day/night, parking, truck limitations)
Heat or no heat.
What if any restrictions.