FD3S - Exact measurements of Block off/blanking plate (OMP)

[Staubkappe]

I haven't found any blanking plates or especially OMP blanking plates for sale in the EU so far and i was wondering, if someone has the exact measurements of one or has one in his garage.
Once i have the measurements i could get it manufactured by a relative working in a company doing laser cutting and machining on different kinds of steel.
Even better if i could collect the measurements of more block off plates.

Any help is much appreciated

 

[Paulm]

Advocult sell these in the UK, https://racingcult.co.uk/products/13b-omp-delete-blanking-plate.html, if that i no use I should be able to measure a Franklin one next week