Hi Nick,
here is what I have on V. auffenbergi:

Sprackland, R.G. 1999. A new species of monitor. Reptile Hobbyist 4(6):20-27.

Hogston, J. 1997. Notes on the Roti Island tree monitor, V. timorensis ssp. (rotiensis? We'll see), in captivity. Dragon News 1(2):3-4.

**Kirschner, A. 1999. Bemerkungen zur pflege und zucht vom timor-waran der Insel Roti, Indonesien. Herpetofauna 21(123):13-18.

** breeding them!

Good Luck!
mark bayless