How to get past QEMU issue?

[BugTracer]

First, I'm new to this forum, please forgive me (and correct me!) if I post incorrectly.

I'm encountering a problem with virsh, trying to use the blkdeviotune command. The software versions I have installed are:
Using library: libvirt 0.10.2
Using API: QEMU 0.10.2
Running hypervisor: QEMU 0.12.1
Centos 6.5

From reading bug reports, I think the error I am encountering ("error: Operation not supported: block_io_throttle field 'total_bytes_sec' missing in qemu's") is a known problem in qemu 0.12.1, and has been corrected in newer releases. I'm not seeing more up to date releases in the mirrors however.

So my questions are: is there a newer release for qemu supported in 6.5, and if so, how do I access it? Is an updated qemu release something in the works? Alternatively, is there another workaround to get the blkdeviotune features working?

Thank you!