In Germany, there is now a laboratory where you can get tested to see if you have components of the mRNA vaccine in your body (blood, tissue samples, etc.).
-> https://inmodia.de/en/

The Institute of Molecular Diagnostics (INMODIA GmbH) offers detection of:
- Spike protein
- ‘Vaccine mRNA’ (modRNA)
- Contaminating DNA (plasmid DNA)
These components can be detected in the following sample materials:
- Tissue samples (biopsy or autopsy materials, fixed or unfixed)
- Blood plasma
- Cerebrospinal fluid
- Immune cells from whole blood or cerebrospinal fluid

It's great that a service like this is now available!
I expect that many more such laboratories will be opened worldwide in the near future, or that existing laboratories will start offering these services...