I'm sure there are tons of anti-SAM guidance packages which will steer something towards a SAM transmitter, but that's in an entirely different frequency band from what I remember.
Terminal guidance systems tend to be in the UHF and SHF bands, generally gigahertz and up where as FM is VHF at about 100MHz.
It'd take a fair amount of work to re-engineer a guidance package to find such a lower power FM transmitter and perform terminal guidance on it. Especially when the world is awash in FM all around there too.