International money orders cost money to create at the bank (approx 5 US dollars in the states for example, 4.50 Canadian dollars , 45 Swedish Kroner and so on) - in fact they usually cost more to create than an upgrade around here does.
If you still think this is worth it to you - creating a money order on the sum, plus the cost of creating it on top - there's more bad news. Apart from buying postage and envelopes to Sweden, once it arrives here it costs us one hundred and fifty Swedish kroner to cash the damn thing - effectively eating the entire sum (or more) than we are trying to cash. In the end, we get nothing and the banks laugh a really mean laugh that would have Batman's Joker green with envy. So no, we do not accept international money orders and we think you're a bit silly for even suggesting it.
You may use your VISA or Mastercard. These are your options.