I agree with Black Moon about setting up a spreadsheet. However I suggest you use the Long Island Corvette catalog and part number as the basis for your inventory system. During my restoration I have ordered (or plan to order) about 900 individual parts. By using the LIC number of the basis of the inventory I can quickly tell if I have ordered it yet or not and it helps keep me from getting confused and ordering something twice.
You can order it from whoever you want but control the inventory using the LIC number.
The first columns of my spreadsheet are:
LIC Section
LIC Description
LIC Part number
Ordering Vendor Name
Ordering Vendor Part number
Units
Unit Cost
Total Cost
...etc.
my 2 cents.
Dave