Sending plants from here to there might be too much hassle. Maybe check what local nurseries don't have much of. Seeds of good Asian species that are ok as seedlings like Durios, better types of mangosteens, top jacks and chempas,kwai muk,keladang, Asian Garcias like dulcis,enkala,safu,dabai etc would work. Maybe a few improved American species like good abiu,giant Mossman black sapote and sweet flavicarpa passionfruit would be appreciated and they go fine from seeds. Even a few natives like blushwood,davidson plum,kakadu plum,backhousia,diploglottis,black apple,mt white lime could be welcomed.