Looking for original source of an old DVB tree

Hello,

Short version:
I am looking for the original source code of a Linux DVB tree containing in particular
drivers/media/dvb/dibusb/microtune_mt2060.c
and the directory

    drivers/media/dvb/dibusb/mt2060_api

Googling for microtune_mt2060.c and mt2060_api is no help. Could anyone kindly point me in the right direction, please?

Longer version:
I am trying to get my USB DVB-T stick running on my Xtreamer.
Xtreamer uses an old 2.6.12.6 kernel heavily modified by Realtek and possibly also modified by MIPS. I have the source code but it would be a tremendous effort to change to a recent kernel. The DVB subtree seems to have been dirtily hacked by Realtek to support their frontends. In the process they seem to have lost support for other frontends.
I have been trying to find the source code for the original version.
I have fould nothing resembling it in kernel.org, linux-mips.org and linuxtv.org.

TIA.

Cheers,
Chris

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