I was going to suggest Sierra Valley Enterprises, but their website is gone! I sent them an email to see what's up. Does anybody know? I hope Gary is still operating the business. He had nice sprung journals in 1:20.3 and 1:13.7 scale-- among other things.
Hartford Products made some also. They're belly-up at the moment, but stores that stocked their parts may still have some on hand. Worth a call, at least. I can vouch for the Ozark ones, though. I'm using them on a project, and they work quite well.
I just got word from Gary over at Sierra Valley that he is alive and kicking. He has been having intermittent problems with the website though. I would give him a call. His journals and wheels are very nice.