Flo cast was never manufactured by Ultima but bought in from other sources like Bayer was.
The firm that manufactured the hollow line is Gruppo in Italy which is distributed by ASSO in the Uk but they tend to promote mostly sea fishing product as they are stronger in that area.
Asso will order odments like the floating line on request from a tackle dealer, they also manufactured the old Pro-Micron originally sold by Fox and more recently by Frenzee and several other lines re packaged for Uk firms.