Good luck with the search - I have only seen one Familia for sale
with the front bunk set up like you want in the USA in the last six years. I think it was in southern California.You might want to check the Fiberglass-rv-4sale.com site as they list Eriba trailers as well.
Search Results | Fiberglass RV's For Sale
I own two Eriba trailers - a Puck and a Triton and they are very impressive little campers. Parts are hard to find but Jandi Caravans in England can supply some items and they are very helpful There is an English Eriba forum here that is very informative:
The UK Eriba Forum