Is this the flat 300Tdi/non station wagon Td5 type, or the dished Td5 Station Wagon type??? (in leather or plastic - depending on whether is a CSW or just a Station Wagon)
If it's the latter, then the cover is part number QTF100220 - but its not cheap at just over £40, or if it's the flat Tdi type the badge is NTC8848 and is less than a fiver (from your main dealer)
If your fitting it to your Land Rover I'd imagine its the TD5 station wagon type as this has the same splines as any pre 1994 ish Defender (although a lot of 200Tdi were also fitted with the later steering wheel)
Ian