I need 3 impellers for a Whisper 1 or 2 and 1 lift tube for a Whisper 2 HOB.
This one: http://www.kensfish.com/parts-fittings/whisper-1-2-impeller.html
If you've got a couple impellers and a lift tube, then you can have a complete Whisper 2 filter...
I'll be at Aquafest.
Matt