Your best and probably only bet on finding any Spider-Man game on the PC would be to buy find them and by them off Amazon or ebay.
With Activision looking like the developer of most (maybe all, I haven't looked into them all) of the Spider-Man games on the PC, it's reason to believe that they lost the IP to further distribute/sell any Spider-Man related property. With that, Disney pretty much pulled the plug on any and all IP that wasn't under their umbrella. Spider-Man, along with the Marvel Universe was acquired by Disney or owned by Sony (such as Spider-Man's case if I remember correctly) some time ago (as most folks know).
