Aqua
I went to Jansens after work. Your impeller I believe is the new one (the old impellers had a white bit that breaks off, yours is a black bit) the retail is 19.95. the newer impeller blade is about the size of a fifty cent coin, the older roughly the size of a twenty cent coin.
Not as pricey as some impellers, but still it isn't to nice to have to pay that much.
Try Hollywood for price, his mark-up is considerably less, and I belive they may offer a discount if you belong to a fnzas club. (don't quote me on that).
I plan to join a club next week, so I may be able to tell you for sure afterr that. Otherwise someone in the know could answer.
Matt