Yeh yeh, and there's some bonus grime and grease too!
I'm sure there's a bunch of people who have borgeson steering boxes and side pipes, best bet would be a search on some of the US forums, it's what I do when I'm wondering about parts.
I have the Global West upper arms, which come with their "Del-a-lum" bushes. Guessing they're delrin or similar. I'm using poly in the lower arms.