Replacement impeller shaft???
 

I have a Odessea WP-500 pump on my AquaC Urchin skimmer. The ceramic impeller shaft is broken, and now it doesnt start up all the time. I have to tap it occasionally. The pump is fine, and the skimmer/pump are pretty much sized to fit in my sump so getting a different pump in there may not be possible. Can I just get replacement Ceramic shaft? if so, where???

Thx in advance.