Woofer manufacturor for Aerial 5Bs

Thanks for your response.
Comparing the part number on my woofer with those on web sites like Madisound I found that Vifa has very similar part numbers. I then searched and found a Sterophile article stating Vifa made custom woofers for Aerial 5s. I have sent an email to Aerial.
Thanks.

I am using the 5s as rear-side channel channel speakers in a 5.1 channel home theater set up. I did not notice the moment the woofer stoped working, so I do not know what happened. However, there appears to be no externaly visiable damage.
I suppose if the replacement from Aerial is comparable in price to a pair of used speaker, I'll get the used speakers.