Walzburg china service for 12

I cannot find any information so I hope someone can help.  I have a full service for 12.  Recently broke 2 teacups and need to replace them.  I also have platters.  They are all numbered.  It is Walzburg pattern WLB28, gold rimmed and embossed.  They say Walzburg Made in Poland on the bottom with makers mark like a ornate W. If anyone could find information about when they were made, how to replace the teacups, and the value, I would be very appreciative.  Thanks