The e-Bay boot that I bought when I replaced my shift knob works just fine for me. You'll probably need to move the hard plastic frame on the bottom of the boot from the original boot to the new one but that is easy to do without damaging anything.
More on my shift knob project here -
https://rx19jones.wixsite.com/projectboxster/projectboxster2
Good luck with your project and do post a photo when you're done!
cheers - dj
