Hi ther looking for a part number for hst number plate plenty mine doesn’t seem to fit right only some of the screws have anything to mount to

That looks about right. I think mine is held on with self tappers. 2012 5.0 SC AB
Mods:
TPMS
Genuine LR DRLs
Remote Boot close from key fob
2016 Discovery 4 Mirrors AKA RRS2
2014 L405 Surround Camera retro fit (WIP)
2013 RRS Dual View Screen fit (Complete)
2016 LR4 RSE
2014 LR4 Homelink
2016 FFRR Electrochromatic Wing Mirror Glass

70 plate Focus ST (Current)
1942 VEP Ford GPW Jeep (Willys) (Current)
1943 Whites M16 Halftrack (Current)
16 plate Eurofighter Typhoon, 2 x Eurojet engines with 20,000lbs thrust each. 1380mph

No specific plinth listed in the HST body kit, same one for all pre-facelift UK spec. variants DRB000111. Have seen a few HST's with the plate screwed direct to bumper, can't remember whether my old HST had the plinth or not.

Cheers
Col