Are Sheaffer Vac Fill Plunger Rods Being Reproduced, and if they are, where do I get them?

I have a couple of 1930s-era pens with the old-type, coated rods that need to be replaced. I'd like to just replace them with new stainless rods instead of searching around for donor pens.

I would consider making rods for my own use as well, but it's probably easier just to buy a few than it is to go to the trouble of making my own.