If you took it to the dealer what did the diagnostic print out of the system list as the problem? There's no way the entire system could go bad at the same time.

I would take it to a different dealer and pay the one hour labor fee for them to run a diagnostic on it. It might be as simple as a system reset. If that's the case they could do it for free.

There is only one fuse for the SRS system and if it's blown then there is something wrong. It's in your fuse box covered by a yellow gaurd so you can't remove it.

If you recently installed a radio, alarm, or anything else that interfaced with the electrical system I would retrace my steps to make sure the SRS systems wireing was not affected. No sticking test lights in yellow loomed wires or etc.

If something was unplugged and then reconnected then the system would show a fault and need to be reset regardless if the problem is no longer present.

SRS is a pain in the ass. Good luck on identifing the problem. But I would check out the obvious first.