Off the top of my head, I can think of lots of replicas that people wear, depending on their character template (or would love to wear if they could get them)
Gladiator's Collar
Lt. Sash
Detective Boots (3 varieties)
Most Knowledge person (up to +5 HP, although there are other robe options now)
Jade Armband
Detective of the Royal Guard Cloak (+20 skill in an unused slot!)
Tongue of the Beast (awesome for Bards & Tamers)
How fast they wear really depends on the template as well. Throwing a collar, sash or boots on a sampire is high-wear no doubt; but then again the template is built on the premise of taking insane amounts of damage but leeching still more. I've been using a Tongue of the Beast replica on my bard since SA opened (got it first day), have done several hundred spawns since and I haven't yet had to repair it - in fact most of the damage has come from a couple fights with harbingers, Monstrous Interred Grizzle and the Bedlam Champ spawn. I've been wearing a detective cloak replica for several months and it's sustained just 4 damage thus far (on a ninja archer).
Really depends on template, but even on a high damage sustaining character, you'll get months if not years of use out of it. Also, it might bear mentioning that the newly introduced SA arties doesn't appear to be replicas - I've picked up Ironwood Bow, Wall of Hungry Mouths, Sign of Order.