Fuel cap gaskets

[FinViking]

Good day.

I'm having my fuel tank painted soon, so there I was inspecting the fuel tank and noticed some cracks with the fuel cap gaskets. They probably let in some water in the worst case. Both gaskets seems to be replaceable just fine.

Problem is im having no luck finding these gaskets online. Any help is appriciated

My BT is early 2005 model with old style speedos etc.

[FinViking]

I found fitting gasket, it's a perfect match just fitted on my bt 1100 fuel cap. Here's link : https://www.guglatech.com/it/ricambi/35 ... 91-01.html
Outer large gasket seems impossible to find anywhere. Too bad.