Door Lock Grommet

The grommet sealing the habitational door lock has seen better days and need replaced. 
2004 Ravenna and thinking the door lock is Dethleffs Europa 7000204, although not 100%

I've uploaded a picture for reference. Also found a 3D printing guide, which shows what I think
may well be a file to perhaps have one 3D printed? Just not sure if it's the correct part etc.

Any advice greatly appreciated. 



3D Printing Example

I tried to get one of these seals for my last van, no joy at all, in the end I bought a piece of neoprene sheet of Amazon and cut one out myself after tracing the old one on the a piece of paper to use as a template