If it's a basic column there's an upper bearing and lower bushing. The upper bearing can probably still be had at your local dealer. The lower plastic bushing supports the shift tube and is what I would consider a 'non-precision' part. So, unless it's broken you can probably reuse your old one or a donor.
Complete switch assemblies are available from a number of sources but are getting spendy. Sometimes a new cancel cam is all you need to fix a switch. Napa and others carry them.