We bought one online. It had the capability to record results and be downloaded to your doctor if needed. Bought it from here
It arrived speedily and we've had no problems with the unit. It originally arrived with an overseas power plug attached, but a phone call got an Australian one sent out immediately.
I would recommend them.
Editted to say that if the baby has apneas there is a monitor with an alarm attached that can record apnea events. We got ours (9yrs ago, so probably others available now!) from our childrens hospital respiratory dept where DD was being seen. Has your friend been referred to that dept?
Edited by songshirah, 08 January 2013 - 10:46 PM.