you can have one of my spare 4th gen front wings if you want to try and cut out an replacement back arch - might be more hassle than its worth and dont know if it would work out but its there if you need.
1996-2000 1993 EG9 Blue Civic 1.6 Vti - Traded in against the BB4
2000-2019 1994 2WS BB4 Milano Red JDM Prelude Si VTEC LSD
2015 on > 1991 4WS BB1 Phantom Pearl Grey JDM Prelude Si VTEC LSD
2021 ON > 1998 2WS BB6 White Pearl JDM Prelude Si VTEC
I thought the idea on the repair panels are that you can cut them down to what size you want. Would you not be better off buying a brand new panel rather than 1 cut out of a car that might have rust starting deep under the paint that you can't see as its gonna cost you a similar amount to get it fitted.