Ok - here are the Rape centre in Queensland - they will have information about counselling/therapy/resources for your friend/you - sometimes they may refer a 16 year old to a child and adolescent service (in SA Yarrow Place - the rape and sexual abuse service normally refers young people to the service I work for) - I do not know the practice in Queensland. But I do know that you/your friend can ring up anonymously and find out!
Sadly, often there are long waiting lists for therapy services.
I know you said you guys were not ready to ask for that kind of help - but when you ARE, here it is:
Brisbane Rape Crisis Centre Phone:(07)384 4008
Gold Coast Sexual Assault Support Service Phone:(07)559 111 64
North Cairns Women's Centre Phone:(070)313 590
Sunshine Coast Rape Crisis Centre Phone:(07)5499 3066
THis site offers general stuff - it is a UK site:
http://www.aest.org.uk/helplines/australian_new_zealand_support_lines.htm
It includes this reasonable-looking page on that damned guilt and self-balme!
http://www.aest.org.uk/survivors/guilt_and_selfblame/index.html
This is another Queensland services listings - hotlinked:
Queensland
Sexual Assault Referral Services - Queensland
Australasian College of Sexual Health Physicians
Cairns Sexual Assault Support Service
Tableland Rape Crisis and Incest Centre - Atherton
Warangesda Family Rape Crisis Centre
Immigrant Women's Support Service: Sexual Assault Program
Gotta go - I will find more for you guys.