Black 105 rear mech

[marge602]

Hi folks. Been looking for a retro-ish Shimano 105 rear mech for my new retro road bike. I think it's from the 5500 group from around ten years ago. I already have a pair of black 105 Hollowtech cranks which run an Octalink b/b, and would like a short cage rear mech to match it.
Regards, Marge