If you purchased the MN-50 as a PCB only, you can find the assembly guide and bill of materials below.
As of August 2016, all of the parts are available from Mouser. You can use the spreadsheet below and Mouser's Part List Import Tool (must be signed in) to quickly order all of the parts.
Make sure to double check your cart against the BOM before ordering! We can't guarantee that Mouser will have everything in stock.