I'm located down in Mexico so I can understand your situation. A lot of issues never arrive in my mailbox so I go out and buy one at the only store that sells the mag here. Sometimes it's just very late and I end up with two copies. A friend typically lucks out when that happens since he gets the extra copy.
I contacted FSM about this before and they were very helpful, even replacing a couple of issues I had missed out on and extending my subscription a month, with extra no cost to me. I haven't asked them to do it again since after all, I realize it's not really their fault, just the crappy mail service here.