Need new hobbed bolt

Can you guys please send me paypal invoice for a new hobed bolt ?
One that came with the printer turned out to be cut uneven, causing waves in layers.
I replace it with one i bought on ebay but it came with bad recess cut. One cut was slightly overlapping the last cut so filament would skip.

I need another hobbed bolt and i dont know where to get the right one. Ebay has ton of them but only few of them have correct lenght.


Thanks !

 

Tony try this instead: http://www.robo3dprinter.com/pages/technical-support