This page shows what the new ones look like (just scroll down a bit).
If the hole in your frame is threaded, a bolt would work to push the axle, just use a lock nut to keep it in place.
If the hole is not threaded, then probably the width of the slots will be bigger than the axle diameter and you will need to use axle carrier like in the photo.
You might try contacting Sillgey.