Great pix! And a very cool car! I am betraying my age to also note actual details in the photos...the siren speaker appears to be tilted upward a bit. The mounting block (the black piece of metal the siren rests on) is possibly installed backwards--or the speaker is a bit bent. Unbolt the bracket and turn the block 180 degrees and see if that helps. Also, Unity sells their original spotlights and handles under the "vintage" category.
Ok, so I'm not completely old and dead (yet)...is that a cross between a French maid costume and a meter maid costume (French meter maid?)??? Also, I'm surprised there's no paint wear on the hood/fender from all the takedowns.