OK Had 2 seconds to think, and personally.. If I never wanted an 'Irmy' grill or the standard VX one, I'd be whacking an OP grill on. They do look the dogs, and are not that common.
I'm pretty sure with a bit of bodging, you could change the Opel badge for a new VX one... OR... Change all your VX badges for Opel ones like most people who have an OP grill do.
I've been tempted so many times to swap mine for an OPC grill.