Source for left-hand thread helicoil?

[bobterry99]

I spent hours searching the Internet and can't find a source for any metric left-hand thread helicoils or other repair inserts. McMaster has left-hand thread, but they are not metric. I am looking for M10 x 1.5mm. I know this exists because I am replacing an existing insert that has been damaged...

Thanks in advance for any help.