Vr4 failure, after 300 miles

[94gt-sn2000]

well as the title says my vr4 just failed with only 300 miles on the upgrade, i was driving down the road not getting on it at all and the blower started making a whining noise, alot more than normal. so i took the belt off and drove it home. I got the blower off and took it apart, there is a small chip in the shaft that is connected to the impeller, all the balls look good and the races look fine, how much is that part? here are some pics so you can see. and has anyone else done this?
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[pavement pounde]

You are right on time, that impellershaft runs at I believe $150-$200 new, but I bought one 2 years ago from Graig used for $100 and stil run it.
While you replacing the shaft I would also shange the 5 balls.
Are you absolute shure the oilcooler is working properly ?
And also balltorque is not much ?