I googled looking for the Aust link on it but this is a pretty medical write up on it. I think I took in maybe half of it.
http://www.australianprescriber.com/magazine/17/4/96/9
Written from 1996 so I think the costs are way higher now and the needles don't keep for an extended life so they wouldn't have a big ready supply or there might be expiry date wastage.
I think if there were any out of pocket expenses they would notify me immediately as the chemo mob (well mine anyway) are very good at not upsetting me in my fragile mind state atm.