I wouldn't worry about this if I'm in SD. Previously, the Bolts were on KSPN (710) and another L.A. area station whose identity escapes my memory.
Since the Rams & Raiders left L.A., radio stations here have carried the Rams, Raiders, Chargers, 49ers, and an outlet in Ventura County is carrying the Cowboys.
I can't speak for the L.A. area of course, but if I was to guess at what the consensus opinion here is, it would be that we're doing just fine without an NFL franchise, that the previous owners (Al Davis & Georgia Frontiere) of L.A. teams treated fans like garbage, who needs them, and who cares?
If the Chargers were to move to the proposed (not a done deal by any means) new stadium in the City of Industry, it would be only after the Chula Vista situation and the SD City government situation (Mike Aguirre) play themselves out fully.
I used to live in San Diego (Coronado mainly), and I attended games in old Balboa Stadium, concrete seats and all. The Chargers have a proud tradition in San Diego. Trouble is, in today's NFL, tradition means virtually nothing. Ask fans in Baltimore and Cleveland about that.
I hope the Bolts can find a way to stay in the market, but as always, business is business.