Where to find long length athletic pants?

[KKB]

DS14 wears a men's medium waist size, but they are all too short! He can't go up to a L as they fall off!
Any ideas where to find them in longer lengths (hopefully well-priced)?

 

[Cadiewampus]

DS14 wears a men's medium waist size, but they are all too short! He can't go up to a L as they fall off!
Any ideas where to find them in longer lengths (hopefully well-priced)?

I bought some for myself couple of weeks ago a Kohls. They are Nike. I am 6' 2" and in bare feet they are probably 2" longer than the normal ones. Of course I do not use mine for anything athletic unless you count sitting on the couch drinking a cold beer athletic.