Looking sleek as per, I'd would look to use these black caps if they'd fit the recess.
https://m.ebay.co.uk/itm/128-NUMBER-PLATE-CAR-FIXING-FITTING-KIT-HINGE-CAPS-SCREWS-YELLOW-BLACK-WHITE-REG/350359071434?epid=1555729101&hash=item5193072aca:g:AlUAAOSwiYFXI0IY
This is whats in mine, and would have again.
https://m.ebay.co.uk/itm/FOR-NISSAN-350Z-3-5-FAIRLADY-EXEDY-ORGANIC-STAGE-1-SPORTS-CLUTCH-KIT-Z33-VQ35DE/151091038591?epid=1484468337&hash=item232dba497f:g:eYkAAOSw-jhUByRU