Any ideas on where I could get woofer repaired?
What is the matter with the woofer? If it just needs refoaming that is likely possible. If the voice coil or cone are damaged that set of speakers is finished in all probability.
There used to be quite a few speaker repair places but they are closing. There are no sources of parts for Sony drivers that I can tell, which is becoming the norm now, which is why speaker repair places are closing. Simple Speakers are still around, but do not indicate they have Sony parts.
You might want to check with Sony if they have recone kits available. If the problem is not the surround then the speaker needs reconing.
If it just needs a new foam surround then Simply Speakers can help you, or if you are handy you could do it yourself.
If reconing is required, then you need a recone kit, which is cone and attached VC and suspension, dust cap and a set of factory shims. You also need speaker glue.
Failing to get what I have mentioned, it means you need to go speaker shopping.