how to restore faded door panels on '75?

[working on it]

Though I haven't posted in a long time,I pop in to read the 67-72 site posts occasionally (spend most time on my 66 chevelle footbraker,member of Team Chevelle).I just acquired a 75 c-10 for a backup to my 69 c-10(daily driver,tow vehicle for the chevelle).I just can't bring myself to buy a new vehicle(I want to be able to do whatever I wish to my cars w/o government interference).So now I have another project on my hands(also Fiero,S-10;not shown in my signature);I need to do minor interior cosmetics to the 75 to get my wife to allow it to stay(and get her to use it).That's why I need to know if the faded plastic door panels are either restoreable,paintable,or replaceable?And the cracked dash recoverable?And is there a source for the gauge and speedo plastic (now opaque).I only have sources for parts for my other cars,not for this new kid on the block.And what later models might be donors for interior components,if any?Any help will be greatly appreciated.Thanks!

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69,75 c-10's(350);66chevelle(427);65chevyII(327