Wanted: Cheap Light alu Road Frame 56/57

I've an older cannondale r2000 frame and brand new columbus tusk forks. Fairly sure it's 57...only issue is the little piece that the short piece of outer cable from the rear mech fits in to is missing......maybe only good for ss now.

Lemme know if you're interested

Not sure how you would fix that and definitely want gears so I don't think that will work for me, thanks for the offer though.