Priligy is a good suggestion, but it's quite expensive. An alternative is Paxil, which is very similar, but probably 1/10 as expensive. I
Yes, these are antidepressants, and therefore not to be taken without some thought and discussion with your GP, but for the purpose of treating PE, they are usually only taken once, on the day of the punt, so side effects are very unlikely if only taken once in a while, as opposed to every day for long periods of time.