I've just finished my Rockcliffe machine. Cut my first part with it this afternoon. I got my oilite bearings from ondrives.com.

Order Item 1 , Part No : QM27-25 , Description : OILITE BUSH PLAIN , Quantity : 16 , Unit Cost : 2.72

I ended up using 16mm bore bushes as the best deal I got for the rods was in 16mm silver steel.