I don't know about the collapsible columns, but I have one of their tilt columns I acquired used, age unknown. I noticed at the end of last cruise season that there was some play in the shaft at the output end. I called their number in Michigan and the tech sent me a replacement bushing kit, free of charge. It was a snap to install. I'll be a repeat customer when the time comes.
I see you're from Australia, but if it's really important to you, a call to them here might be worth your time and money, even if it's to leave a short message asking them to reply to your e-mail.