Ok, here's what I know.
Given the small qty, I don't think I'll be in the price range that a normal person would click with.
So, I found you an alternative. Actually, a pretty cheap one. If I wanted these for my bike, this is probably the route I'd go.
M6x1 lh/rh female threaded hex rod. 2 @ $5.25 ea. 160mm long. If you want shorter you can back track through the website and they have 150mm and shorter as well.
http://www.midwestcontrol.com/part.php?id=3298M6x1 lh/rh threaded ball joint thing-a-ma-bob, $3.15ea if you buy 4. Well, maybe not since you'll need 2 rh and 2 lh. So figure 4 @ $5.46ea
Find some lock nuts and away you go. Now, these aren't anodized so there's that. Find a local place to "add them in" next time they run a load of black. Most places would do that for you. Ask them to hang them by the thread so the body of the rod doesn't have any cosmetic marks.
That's what I'd do at least.
For reference, my anodizer hits me with a $100 minimum. $100 should do about 100 rods or so, just as a guess. With shipping and anodize I'd have to guess you're under $65-$75.
