To add my $.02, I bought the 'EGR Blanking Plate Full Kit' from 'Phillipstuart33' on eBay. £9 inc P&P. It's a plate, gasket and 2 (longer) bolts - with instructions. Delivery was next day. The kit is actually designed to be inserted on the hose side of the EGR valve - leaving the valve in...

It's here: here

You can get a spacer which ads more depth from Sounds4Wheels on eBay