The Democratic Headquarters is at 516 Bridge Street and the person there is Austin Pope. The phone # is 852-2414. If you contact him someone will probably deliver and, if you need help, even put up what sign(s) you want.
I went to the Dem office three times. The hours sign said it was open. It was locked up.
I phoned the number on the door and reached a woman who said Biden-Harris signs should arrive some time soon and she would drop some off. I guess they never arrived. Maybe she meant later rather than sooner.
She did bring signs for Mike Cooney, Steve Bullock and Kathleen Williams.