slashed afterGrace

[Stephan Schöll]

Hi

I would like to obtain kind of a mix of

\relative c' { \afterGrace <cis e>1 d8 <fis, d'>1 }

and

\relative c' { <cis e>1 \slashedGrace d8 <fis, d'>1 }

How do I get a slashed grace note *before* the beat / bar line in a
handy way?

The source I have consulted up to now:
https://lilypond.org/doc/v2.22/Documentation/notation/special-rhythmic-concerns.en.html

Needed for:
Max Reger, Lose Blätter Op. 13, 12. Choral, bar 23
(https://s9.imslp.org/files/imglnks/usimg/d/d8/IMSLP98093-PMLP33137-Reger_Werke_Breitkopf_Band_9_MR_9_Op_13_scan.pdf,
page 14)

Thanks in advance for any suggestions!

Best regards
Stephan