Very interesting tree and fruit. have you ever tasted it? Looks like you need some help from some Austrailians to get this. Although seeds are once again available, but you have an issue with getting this company payment. Can't you send them a bank draft or wire them money in order to get shipment to Pakistan?

Here is a link that might be useful: Davidson's Plum

Price of the seed on ebay is like 3$ for 10 Seeds but using alternate methods cost me near 20 to 25$ so not feasible for me. If i trade with somebody it will cost me around 6 to 8 $.