i've seen the aftermarket ones where it screws into the cupholder. Looks cheap to me. The OEM one is the way to go but yes it's expensive. To save money on one try finding used on ebay or at your local salvage yard.
I have a ebay one and I love it yes it is a bit cheap but its ok it looks good the only problem I have had with it was the bolts fell out in the top but that was after a year and was an easy fix here a pic of it