How to download music onto my iPhone that's not available anywhere else but on Bandcamp.com?

Okay, so I like this band and I know how to get songs on my phone from Youtube, but I can't find this on Youtube; only on bandcamp.com and it's not available for purchase on iTunes, either and I want it on my phone, so do you have any websites that could help me out or do you know what I can do?

http://bandcamptomp3.co.uk/ Then you should be able to transfer it over to your phone