Cowboy's 1971 album "5'll Getcha Ten" has recently been released on CD for the first time.
We knew that Duane played on "Please Be With Me", but according to the liner notes he also played on "Lookin' For You".

We contacted Tommy Talton of Cowboy about this, and he confirmed that Duane plays the 'vibrato' guitar on "Lookin' For You":

LOOKIN' FOR YOU: (writer: C.S. Boyer)
Scott Boyer - Lead Vocal, Acoustic Guitar
Tommy Talton - Harmony Vocal, Electric Volume Pedal Guitar, Percussion
Duane Allman - Vibrato Guitar
Pete Kowalke - Electric Guitar Solo
Chuck Leavell - Piano
George Clark - Bass
Tom Wynn - Drums

PLEASE BE WITH ME: (writer: C.S. Boyer)
Scott Boyer - Lead Vocal, Acoustic Guitar
Tommy Talton - Acoustic Guitar, Harmony Vocal
Duane Allman - Dobro
George Clark - Acoustic Bass, Harmony Vocal

LOOKIN' FOR YOU was recorded at Capricorn Studios in Macon, GA
PLEASE BE WITH ME was recorded at Muscle Shoals Sound Studios in Sheffield / Muscle Shoals, AL

[Edited on 12/28/2014 by abbdiscography]

[Edited on 1/2/2015 by abbdiscography]