I've not looked into it yet, but wouldn't the seat stop pivot arm be an off the shelf item. Maybe McMaster Carr? I don't have one to use as an example, but perhaps someone could take a measurement? (I need one too).
If you are OK with it, get a set of reproduction WLA Harley headlights and modify to fit. I think that's what Steve was doing earlier (I bought mine from him).
Paul Jacobs might be a resource for the rear latch. Shoot him a PM.
I'm going to try to source the perimeter rail locally. I have scrap piece to use as an example to see if a local shop can fab some up.
I hope this helps.
WTB for Diamond T M3:
1. 18G winch parts
2. Co-driver seat stop pivot arm.
3. Early Headlight buckets
4. Rear door latch mechanism
5. PTO shaft
6. Winch bumper pieces
7. Track/rear armor and floor/seat pieces.
8. Top rail angle iron above doors and top of rear armor- (not A1).
9. 50% or better used tracks
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