1942 Universal needs service

Hi, new to forum. Discovered a small box of old watches in my late Dad's stuff including this Universal Geneve Compur chronograph. It winds, runs and keeps time but the four o'clock pusher jiggles freely. The two o'clock pusher clicks nicely but neither pusher does anything so the minute and hour hands and the second sub-dial all count time but that's all. It obviously needs cleaning and routine service so I'd like to receive some advice on who in the USA is reliable and trustworthy for that service. I'm not shopping price, looking for quality service as I intend to wear this and pass it on in the family eventually. I've contacted a few of the watch service companies on the web but been told that they won't accept it for service as parts are unavailable. If it's not clear in the photos it has a cal 285, 14 ligne movement. I appreciate patina so I'm not hung up on it looking like new as long as the time can be told. Thanks for any guidance provided