No worries.
I have tried to find a picture of the sinker. No luck. It was never a very popular sinker so maybe they just don't make them anymore. They are the shape of a brick with an arch at each end. You put the line through the arches and the sinker will always stay upright. A large one would be 1 or 2 inches long.
Anyway, most of the spiked sand sinkers and the star type too, have large holes and will work much the same. Many of them actually use a brass swivel.
Let us know how you go.
I have had good results using soft plastics on the beach. Just cast out, feed line out and let the lure drift with the ebb and flow. You don't need to work the lure but rather let the current work it.
itsaboat mate...Life is just a boat and then ya marry one !