I once did the visible bit of the sill under the two doors on a very low car park crash barrier. I was worried it had done the floorpan in, but come MOT time not a murmur, even as an advisory. Seems some sills are actual sills and damaging them causes a write-off, and others are only covers, the real sills being inside. My impact was longer and straighter than yours, so check how far the damage (buckling?) goes under the floor, but you might be lucky.
53 1.4i MS MPV RIP 53 1.6 MS Desire RIP
08 C4GP 1.9 VTR+
I would go on a site like breakerlink and enter my details and get another passenger door and swap it over rather than repairing. You may even be lucky and get a red door. There are other breaker reference sites check them out.
Are we there yet?????
Ex 1.6hdi van now 3 seater 1.4 multispace