'64 riviera seat sliders

[64riviera]

Since it was raining today I tried to figure out what was wrong with the power seat in my Riviera.

I found out that those little white, plastic things that are used to take the play out of the seat slide (and make it slide) are broken.

I tried to find out if anyone still makes or sells these but no luck so far. Took me quite some time to figure out how these things are called. Finally I found a site where they are called "sliders".

I borrowed a picture of that site to make clear what I'm talking about.

Mine are round instead of square, so I can't use these.

Does anyone know where to find these things? Is "slider" the right name for those things or did I search the internet for the wrong things. Would explain why I didn't find any.

[64riviera]

Hmmmm, no one?

Looks like I'm going to try and make them myself.