A few years ago, I replaced the INEX supplied plastic bushings with bronze bushings from my local ACE Hardware store. I was able to find one of same OD dimension and had to slightly open up ID to fit properly with steering shaft. I was able to lightly press fit bushing to steering shaft tube and then drilled small hole thru tube and bushing, tapped hole to install grease zerk fitting. Worked great for me and was very inexpensive in the pocketbook as well. Good luck!