Chevy & GMC Vans

Hi group! Does anyone know where to get '81-'88 sliding door arm parts? Specifically the Small Torsion Springs that operate the 2 pawls in the roller dolly that slides on the exterior, upper rail. 1 latches the arm in the closed position, the other in the closed position. That's the broken one. I think they are all the same throughout the model and year range '81-'91 G10- G50 & G1500 - G3500. Any help would be appreciated greatly.
I'm attempting to get my son's "83 G2500 Vandura back on the road.

Hi and welcome to the forum.
Please don't post technical questions in the 'Welcome' section. I'll move it to G-vans for you.

Have you tried asking your local parts dealers or GM parts counter? Online dealers? (GM parts direct, rockauto.com etc.)