Any half decent machinist can do this, best people to use are the old retired hobby type people.
Get a local magazine about modelling in minature or similar, this will give you loads of leads, if not at least it will give you club details, then contact the club and ask who could do a small machining job for you, it will only take about about 1/2 hour to do start to finish, it wil be reamed to suit after the plug of oilite is pressed in, you won't be able to even feel any movement, but it will rotate perfectly.
Maybe have a look in GULEX ?.
tabetha