Probably very few if any Iain.

sadly, most original members are no longer with us and the Club closed two years ago. There's still an active group of ex members still continuing however and they are holding a Spring Meet this week in Norfolk. I'll see if I can pass your pic onto them.👍
Randa
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I presume you mean the dots before each letter Steve?
Otherwise Eriba is named after the designer Erich Bachem who with Erwin Hymer after WWll when they designed Luftwaffe planes and rockets, got together to design caravans.
Erich died young and the Eriba is named after him.

As Bacham's wife's first name was Erika it is also possible that the brand was named in her honour.

Talking of the EOC, since they disbanded two years ago, a Facebook group called "Eriba Friends' have taken up the organising of Spring and Autumn events and one of the team, Charlie Pabor ( Shady Pines) tells me that the Norfolk meet just finished, had 40 vans and that 3 attendees remembered the 1995 meet.