@Spirit-Harmony the radiotherapy clinic at St Andrews hospital supplied Calendula cream.
Some ladies on here have had much success with Mepitel film to protect against burns - you could do a search on here to see their experiences and hopefully someone who has used it will come on here to chat.
Just a quick caution - radiotherapy in public and private system is the same except there can be a huge gap in the private system as it is not considered a hospital treatment by private insurers and thus is only covered by Medicare. . My excess was $2000.I have learnt that you can blend private surgery with public radiotherapy .The excess can be very high if you have a lengthy course of radiation.