Gasket for Lewmar portlight

[marioxp]

Please help me how to find a suitable gasket for the portlight. The portlight began to leak, sand accumulated in one place and it deformed the gum. I cleaned it and smeared it with silicone grease, but it still leaks.
As you can see in the picture it is a Lewmar portlight (probably New standard portlight) with three clips. Boat is built 2003.
Markings A0816 12B3 are visible on the acrylic.

Is it possible to order gasket by lenght somewhere?

Mario

[Ailatan]

I think this will suit you: https://www.svb24.com/en/lewmar-seal-for-bavaria-portlight-694-x-248-mm.html
Good luck because I have heard that is not easy to change. Maybe you can comment your experience when you finish