I bought my " stubby" from cd3 fusion and it fits perfectly with no gap between the antenna and the base. The product ID is FSA, CD 3 Fusion Short Antenna and it cost me $23 plus shipping.
This is just one man's opinion but I doubt that there is any added benefit to these add-ons. I hope that you enjoyed your time with the lovely young lady as that is about all that you got of value.
Has anyone seen or heard of a release date for the 2011 Fusion order guides? Is it possible that things like Homelink, push button start or paddle shifters might make an appearance in the 2011 model year?