On the GoWesty plate bumpers, they have a rubber(?) half sphere that encloses the bolt tops. I’m sure that wasn’t custom made for them, so there should be various sized similar ones out there. 

> On Aug 5, 2015, at 2:15 PM, Alistair Bell <albell@SHAW.CA> wrote:
> 
> I posted some pics of the painted front bumper. Mostly made from 1/4" 6061 aluminum, some bits are 5052. All was scrap bits left over from other work. Mounted to stock sun bumper with stainless brackets. 
> https://shufti.wordpress.com/2015/08/05/vanagon-front-bumper-pics/
> 
> Alistair