I just did a search for tower shank elbow long, and came with nothing helpful, I looked at 10 to 12 sites, sorry.
Where ever you saw them on a complete tower assemblies is where I would start asking if they can sell you the shanks only.
Bartender Ill have what the gentleman on the floor is drinking.
I have spent more $ on brewing equipment than my truck cost! WileECoyote
Green beer sucks, let it age/condition/finish and become great before drinking it. WileECoyote
Good/Great beer takes time! if you want a quick beer go to the store or bar! WileECoyote
Things come and go. Good beer will live on for ever ! WileECoyote