You could probably get a 555 timer at any of the many little electronic shops around town.
At Ever Mall on the main drag (Perdices St.) there are several cell phone repair shops. Any of them could solder the timer for you. I've had them replace all the little switches on my garage door remote with no problems. I found the little switches I needed at Bernardos you might try them for the 555 timer.
Informative x 2
