replacement nylon upper bed roller

[pjstock]

I seem to be missing one of the white nylon rollers for my upper bed.

I've improvised something temporary (from a writing pen shaft) but the outside diameter is not quite right.

does anyone know a source for replacements?

peter

[pjstock]

I actually found the missing roller.
it must have fallen out and dropped to the floor.
but I would still like to find a source for replacements, as I might not be as lucky next time.