Using the URL of the photo posted by Kulverstukas as a guide, here are links to some articles in Indonesian at the same site recounting flight recorder discovery.
As there seems to be only one unit pictured, I speculate that they may only have found one of the FDR or CVR. Can anyone here affirm that this looks like one likely to have been mounted on the aircraft in question?
My copy of Google Chrome offers to translate these pages from Indonesian to English on loading. Failing that, you can put these URLs in to the URL box at translate.google.com or another translation site to get a crude but somewhat useful translation.
Black box discovery led (by) Lieutenant Taufik
Special Forces teams found the Black Box of Sukhoi
The black box was Found 100 meters from the Tail
Over seven hours up and down the mountain carrying the black box