If you wish to build your own diy skis or snowboard, a powsurf board or a splitboard for snow and water go to www.junksupply.com. They offer great quality materials and amazing sevice.
Check out their product page at https://www.junksupply.com/skis-and-snowboard-diy-building-materials/
You can also get materials for kiteboards and wakeboards or ever to build own diy surfboard.
Products they offer are Ski and snowboard manufacturing material supplies, diy ski package and diy snowboard package, diy kiteboard kit, kiteboard manufacturing materials, splitboard, splitboard clips, diy ski and snowbaord, diy kiteboard and wakeboard, make own snowboard, make your own skis, make own kiteboard, make own surfboard, making own wakeboard, Snowboard wood core, ski wood core, kiteboard wood core, wakeboard wood core, ski and snowbaord ptex base uhmwpe, ski and sbowboard abs sidewalls, base for skis and snowboard, PA nylon topsheet for snowboard and skis, PBT topsheet for skis and snowboard, TPU ABS topsheet for skis and snowbaord, Isosport topsheet materials for skis and snowboard, bio based natural epoxy resin for performance, hemp and flax bcomp perfomance fabric materials for skis and snowbaord, triaxial glass fabric, m6 metal inserts, ski and snowboard edges, carbon fiber fabric, paulownia wood cores, wood cores for skis and snowbaords and kiteboard and wakeboards, surf board repair, glass fabric cloth for surfboards, sidewall and insert materials for skis and snowboards, rail abs material for skis and snowbaords and kiteboards and wakeboards, ski package kits, snowboard package kits, wakebaord and kiteboard kits packages.