[maple_leaf_eh]

That is not as daunting as you might think. USGI parts all have stock numbers and parts catalogues. It is a reasonably popular vehicle so other collectors will have trod your same path in the past. There are dealers who have NOS and Take Off parts; you just need to figure out the cheaper and generic corresponding truck, generator or trailer part numbers, without spending bigger dollars on a named AFV part.

In the meantime, I would suggest a rigourous catalogueing of everything is in order. Clean and store what you have. Brush off the loose rust and dirt. Spray with some sort of preservative paint. ID with a hang tag tied with a string. With the right information, you personally won't have to monopolize your active memory with answers to, 'what in blue blazes is this damn thing?' The appearance of pretty parts will be a lot more motivating than seeing chipped, rusted and incomplete ones.