Oh boy. I'm looking for you, but in the meantime, I'll fil you in on what I know so far.

My OS 30VG has a 6mm dia starting shaft, and uses this OWB:

http://www3.towerhobbies.com/cgi-bin...?&I=LXJPZ8&P=Z

I was able to replace it with one from teh HPI Savage, and that's this one:

http://www3.towerhobbies.com/cgi-bin...?&I=LXDLN7&P=7

Unfortunately for you, your bearing appears to work with an 8mm diameter starting shaft. The #5 is the P/N for the whole recoil unit, but the actual OWB that you need is this one:

http://www3.towerhobbies.com/cgi-bin...?&I=LXSS33&P=Z

Knowing that the OS 6mm OWB fails prematurely, one might think that the 8mm unit might also fail prematurely, so I'm looking for a better 8mm unit that will fit in your starter. No luck so far, but I'll look some more because I suspect that a better quality OWB will also be surprisingly cheaper.

Oh....your whole starter can be bought here:

http://www3.towerhobbies.com/cgi-bin...&I=LXSS31&P=PU

EDIT: I looked up the Tiger Drives, but not only does the OWB not appear to be available seperately, a TigerDrive isn't available for your engine due to the short shaft.

Do you know anyone with a Duratrax Nitro evader? I'm thinking the whole pull-start from it might fit you engine. You'd have to use the whole thing as the OWB is not hex shaped and won't fit your current pull-start. Would be cool if it fits, as it's a lot cheaper than the OS stuff. It's here:

http://www3.towerhobbies.com/cgi-bin...&I=LXCLX0&P=PU

There are 8mm diameter OWBs available that are better than the OS unit, but not all advertisements list the dimensions. Sorry I couldnt' be of more help. Maybe someone else has been through this before and can add more info.