You need to get the knife, which is one of the items needed, from the Quest For The Cavern Crystal.  After getting that, go to the MechanicalShop in Junkatolli as the other items you’ll need will show up there. 

hi jolle when are you on t realty wan’t to get a look in the past is there any way i can do a quest just for a day please i’v done my history of tinkatolli and he old one is sooo cool maby you could assign “buddies” that help out new players this tinkatolli it seems like once you do the daly trade and colect you’re blings that there is nothing to do. 
sorry for so many complaints
thank’s for berring with me
your happy player:
-1234Kosre1234