It would help to know what country you reside in since this tree grows in subtropical to tropical conditions.

Difficult anyway - the seeds must not be allowed to dry out once collected from the fruits, so are treated as 'live' plants by seed suppliers. No guarantee can be made that they will be viable when you receive them, because they may dry out or pass through areas where the temperature is too low en route. Mass Spectrum Botanicals in Tampa Florida does sell the seeds though.