However it is probably cheaper to tranfer money to Money.bookers (see the lfsnet payment information, you can find some links there as well) and from there to the devs.
Money.bookers allows you to do a standard money transfer from your bank account, non international, to a local account they have. You can transfer the exact amount you need. Then they convert the money in GBP and allow you to pay Scavier. Fees overall are much lower than the cost of an international money transfer, worth a look.
That is how I purchased S2, cost above S2 for the transfer was probably less than 1 extra £.