Hi jenbug,
Welcome to the Mattress Forum! 
While made in France, it seems what you may have is an old ¾ style bed set. 130cm isn’t a size that was commonly made in Europe, even decades ago. There is a “small double”, where the bed set measures 130 cm x 205 cm (51" x 82"), with the mattress measuring 48" x 75".
¾ mattresses came in two sizes – 48" x 74", and 48" x 72". Your bed set was most likely designed for the smaller ¾ mattress set.
Smaller mattress licensees and manufacturers will still produce ¾ size mattresses (it’s a “common” odd size, if that makes sense), so I would look locally at retailers carrying such brands. While it’s far from a complete listing, some options or possibilities I’m aware of in and around the Washington, DC area (which has some overlap with the Baltimore list) are listed in post #2 here, and Baltimore in post #2 here.
Phoenix