To begin your build use the BOM script available on the PrintNC Discord, linked to from https://discord.com/channels/648972213734604807/1194045790570692689
In order to build the PrintNC, you'll need three different sets of hardware :
There is a spreadsheet, mentioning everything that needs to be bought in order to build a PrintNC.
Details about this list are in the pages linked above.
You can find members of the PrintNC community to purchase z axis plates from below