ISO of shifter knob

so i bought a shifter knob from JC Whitney. Doesn't work as it doesn't screw onto the post. It has 3 screws on the side that screw into the post like a christmas tree stand. i don't want to do this as it i could ruin the threads on the post.

so i have to get on specially for a subaru i'm guessing. anyone have any ideas.

it is an 06 2.5i

 

you would hafta get a subaru one if you wanted it to work correctly

 

all of these are threaded for Subaru:
http://www.subydude.com/osc/index.php/cPath/220_91_122?osCsid=908b877e3e9dc41e6a5b53af6331177d

kartboy is probably the cheapest subaru-specific one:
http://www.allwheelengineering.com/basket/catalog.cgi?query_net_id=kartboy&query_class=KB-015

Note that the all-metal ones will get extremely hot and/or cold. There are a few others out there made from Delrin/nylon that will be much less temp-sensitive.