Dani Alves if he is looking for a fresh challenge, or more realistically the Manchester City right back who was with Arsenal. I' sure Pep will want a younger right back so that is a thought. Only problem would be his enormous wages!!
I'd take Arsenal reject Callum Chambers back any day. There were quite long periods when he was preferred to Clyne. Of course we'd have to coach him back to what he was!
New right back for me. IMO, getting a starting-calibre RB and shuffling off the average would be less of an impediment to one of the Academy kids than having multiple merely okay options.
When I read the options I thought you were hoping Jason Dodds was making a comeback. I think the younger Jason has been playing mainly at RB, not the quickest but good with tackling and positioning, also has a lovely cross on him. the lad Mugabi looks a real talent, shame he lost most of the season. If there are no real stars out there for sale then I would go for Cedric being pushed by youth players
Don't know much about him, but how about Rick Karsdorp from Ron's old club, Feyenoord?. He's young (21), but has recently been called up for the Dutch national team and with our record of developing young players plus the strong Dutch influence at the club, it could be a low risk, relatively low cost option.