Hello,
K65 is very likely not supported in OpenOCD. You might try the kinetis.cfg, but as to my guess the K65 flash is different than the K64, it probably will not work.
As for the sources: there is a source file package available if you download KDS from http://www.freescale.com/kds:

(the source file package is available for each OS (Windows, Mac, Linux).
The OpenOCD in KDS v3.0.0 is the same as in KDS v2.0.0, so you can use either source file package.
Erich