Bak-Pak 2 Replacement Arms?

[delfinparis]

I was cleaning my Bak Pak 2 tonight, and when I went to re-screw the two plastic arms together (in the right chamber - one inside to one outside), I must have tightened it one too many, and the threads of the inside arm broke off into the outside arm.

Totally my mistake, but now my Bak Pak is unusable - does anyone know where I can get a replacement arm? Is there a place that sells replacement Bak Pak parts? Thanks a million!