I know this seems nuts but I am having trouble locating a quality 1g vent bezel that holds 3 gauges. There use to be tons of these on the market but nowadays there aren't as many. Most vendors claim to have them but they have been out of stock all summer. The ebay ones are very thin and reviews on them state that they fall out once the weight of the gauges are added. Ideally I would like the one in the pic below (Black94DSM's car) but I can't seem to find who manufactured it or if you can still buy it anywhere.
http://i226.photobucket.com/albums/dd130/blownsi/3gauges.jpg
http://i226.photobucket.com/albums/dd130/blownsi/3gauges.jpg