They do look like the repro TD latches. If not, they are close enough that a repro original set will fit. You should replace the latch and striker as a set.
If you want to be sure about hte fit, take a photo with a tape measure next to the latch or post the exact measurements. I can compare against my TD.
Former Owner of a 1981 Classic Roadsters Ltd. Duchess (VW)
2005 Intermeccanica Roadster
If you own a TDr and are not in the Registry, please go to https://tdreplica.com/forums/topic/mg-td-replica-registry/ and register (you need to copy and paste the link)