The Ancient Tambo has an Equipment Rank of 101. If he already has a Wand or Tambo customization equipped, he won't take it.
Wait until you have more units that need Jewel Steel, Damascus Ore or Necrotic Metal. When you disassemble it then, everyone that needs any of those materials will get some. --- Now playing: Borderlands 2 (PC), LasRem (X360), Dishonored (PC) Hoyt GMX 23", Hoyt Epic 32lbs, 8125, Carbon One 900