I apologise if this is the wrong place to post this, as I'm a native speaker of English, however, I'm really not sure where to look regarding this question. I'm from Australia, and I speak with the General Australian accent, with perhaps a hint of Cultured Australian. However, I'm interested in modifying my accent to be more like Received Pronunciation, or Oxford English as it's sometimes called.

While there are accent coaches in the city I live in, and this would be the most effective method of doing this, unfortunately I can't afford these lessons at the moment. I was wondering if anyone knew of any computer programs or audio recordings that I could use to work on this myself. I do have someone familiar with the accent who can give me feedback on my progress.
BBC offers some good tips in regards to pronunciation: http://www.bbc.co.uk/worldservice/learningenglish/grammar/pron/sounds /
This site is fairly good since all the sounds are represented. There are also different sites where people of various accents read a certain text with their own accent, RP included:

http://accent.gmu.edu/browse_language.php?function=find&language=english and
http://web.ku.edu/idea /

Those are the ones I'm most familiar with, although, I'm sure there are more of the same kind. Also, listen to BBC radio every now and then if you aren't doing that already.
Thank you, those certainly make for a good start. Does anyone else have any other suggestions?
Students: Are you brave enough to let our tutors analyse your pronunciation?

I've just completed one of their taught courses using the book and recordings. Very highly recommended