The 1989 module "Ranger" says the Eber homeworld is around Zeta 2 Reticuli. In the module, it's revealed that this is their homeworld, and they must have had a drive capable of doing 9.4 ly. This is a problem, because 9.4 ly isn't enough.
The described route says no more than two warps to p Eridani (i.e. what GDW mislabelled as "Rho Eridani"), but the 9.4 ly route is actually circuitous and goes via Stark. There is a better alternative; a tug link.
