I've tried a few payment methods in the past, but nowadays I send cash in a registed, international signed-for envelope, which is automatically insured up to a set value. If the payment is larger than that limit, then I send two lots. A pain in the whatsit whichever, if only they would take Paypal, life would be simpler! But, if you want pukka spares, then thats the place to go!
Then of course, I get another pain once my beloved Government hits me with all the various taxes, import duties, and whatever else they can find to take some more cash out of my pocket........