Yes.
Purchase American iTunes Music Store Cards - these will credit your Account with money to spend in the US store.
You must register under a new email, and have a US address - which I trust, you do
.
You can also have people 'gift' you music, or get people to send you an electronic gift certificate.
You could purchase Cards from Amazon, or eBay.
As for people buying credits on your behalf - there are plenty of trusted people on MR - Katietachoo, Killumanti etc. PayPal them money, and they will send you the code right over.
(Its what I do, and I'm further from the US than you
)