Shop ( winkel)
Recources (grondstoffen)
choose one ( bronze zilver goud)

bingo

You can either go to the store 'Winkel' and buy it directly from the store itself, or you can go to Import/Export ( once per day and in an event case a probable 4 times in a day ( every 6 hours ) ) in 'Handelaar' en hope for the best. Sometimes there is an event going on where you may get these items from expedition or in another event you may get them from attacking an additional planet x.xxx.17