I don't have the solenoid you're looking for, but would like to compliment you on your Wrecker. Was it recently on Craigslist. Looks to have a nice Holmes W35 Wrecker on the back of it. I hate it when the service body sides have been cut down like that. That was commomly done for easier access to the back of the body. I looked for years for one that had not been done this way. You can see mine in my webshots albums, in the links below. Looks to have a '54 cab, with the one piece windshield.
Spanky,
Forgot to add that I'm not aware of it being on Craig list,but could have.
It was at a local competor's business here until he sold out.
As I understand the truck was bought wrecked (broken frame) by the towing company in the late fifties,and rebuilt as a wrecker.
That would probably explain the later cab.
TGP