Originally Posted by ers61
I guess they are the default which comes with Lagoons, is lagoon
sourcing these from that company?
Lagoon certainly did not make them. They're Oceanair new-style blind/flyscreen cassettes, and they're made in generic sizes that fit common hatches - 30, 40, 44, 50...
I can't tell from your photo
, but yours may not actually be broken and in need of replacement. Sometimes all that's needed is to gently disassemble and roll them up again, and they're fine.
A new one costs on the order of 120 euro, for that size.