Not sure if this is the correct forum to post this question, but..

My client has had products for sale on a third parties website.

They are stopping this, which is no problem

But the third parties website has lots of links that are now dead to their pages that contained my clients products.

Now I am not sure if it is illegal I think it is unethical, but could we redirct their link to our website/product page?

Anyone got any ideas of the legal/ethical position?