The trad rendezvous in Fremont Friday the 15th to Sunday the 17th would be the best place for him to go. I can give you my contact info if he would like to get in touch with me. I work in Omaha and I live 25 minutes from Fremont.
As far as trad shops in the Omaha area, there are none. The name John Schaefer came up, which surprised me. He had his own shop here outside of Blair at one time. I talked with him personally a few years ago, and at that time he was planning a move to New Mexico and was selling some of his stuff on Delores' site when it was still up. Haven't talked with him since then. We do have Cabelas, Bass Pro Shop, Scheels, Full Draw Archery, and Woods & Water. Scheels will have the most trad stuff of all of them.
Doug