by the looks of it saying by venom motorsport at the top, i think they would come from them, which can be hit and miss, i've had parts turn up next day and parts that took a month to arrive from them
to be done properly a bit of sheet metal is cut the size of the gap, welded flush and then thin skim of filler and the underside sealed and then whole bonnet repainted
its fine with like 3mm spacers but not with something like 10+, only safe way to run spacers and wobbly bolts is by using spacers that bolt to your hub and then the wheel bolts to the spacer, proper hubcentric spacers