HI, in all fairness to the artist - I don't think shipping prices are within their control. For instance - I was trying to get a record from America shipped to the UK, Ā£40+ for the shipping for a single disc vinyl from them and for the CD it was Ā£28 shipping!
I'm lucky to get a record shipped from the EU for less than Ā£14 these days too- the sole exception being with Amazon...and I've seen a lot of people giving grief to superdeluxeedition & burningshed about shipping costs outside of their control too. I don't believe the label Louise Patricia Crane is on has a USA distributor - I think they're only getting set up with a small EU distributor now, the perils of being an independent artist these days! I'd say though if you have ways of sending cheaper and securely you could probably drop her or her distributor a line, think they would be happier not having to pay extortionate shipping rates themselves.
Re: offering digital multichannel audio files- does bandcamp support that? I'm going to have to plead ignorance on that one, all my surround sound audio is provided via Blu-ray audio, SACD and DVD/A discs. I know a bunch of the spatial audio mixes I was dying to listen to (eg: Sananda Maitreya/Terence Trent D'Arby's debut album for instance) were only available on Apple Audio via Apple TV which I wasn't exactly wanting to rush out to invest in myself. Please, if there is a way of downloading surround sound audio from Bandcamp let me know, I'd be mighty curious!