Products he can't use? What makes you think that? Just because of his age?  
Maybe you're impotent already but that doesn't mean that he is.
He husband should help him find the free porn sites, but give him an allowance for some fun.
My late grandfather-in-law was still sexually active in his nineties. 
Sometimes it doesn't pay to get there early, you can walk in on the craziest things...