Amazon does have skateboard stuff but not a good variety, that being said what they do offer is quality. The only problem being the deck, i've tried to buy decks off amazon and for the most part they only have blanks. I'll link one anyway but you may want to go with a deck from elsewhere. The rest of the board should be good to get from amazon though.

Trucks (in 139mm) : https://www.amazon.com/Independent-Stage-Polished-Standard-Skateboard/dp/B01AKE6Q8K/ref=sr_1_3?ie=UTF8&qid=1524613164&sr=8-3&keywords=Indy%2BTrucks&th=1&psc=1

Bearings: https://www.amazon.com/Bones-Reds-Precision-Skate-Bearings/dp/B000FDRQ1S/ref=sr_1_1?s=sporting-goods&ie=UTF8&qid=1524613269&sr=1-1&keywords=Redz+Bearings

Wheels : https://www.amazon.com/Spitfire-Formula-Classic-Skateboard-Wheels/dp/B00GUOU4WY/ref=sr_1_6?s=sporting-goods&ie=UTF8&qid=1524613294&sr=1-6&keywords=spitfire%2Bwheels&th=1&psc=1

Hardware: https://www.amazon.com/INDEPENDENT-Genuine-Parts-Phillips-Hardware/dp/B00I0HPRQM/ref=sr_1_3?s=sporting-goods&ie=UTF8&qid=1524613373&sr=1-3&keywords=skateboard+hardware

Deck (This is the hard part on amazon) : https://www.amazon.com/Moose-Blank-Skateboard-Dipped-White/dp/B002R6LE7I/ref=sr_1_14?s=sporting-goods&ie=UTF8&qid=1524613395&sr=1-14&keywords=skateboard+deck