I think the gauges closest to OEM style are probably the Autometer Z-series. I have a pic of mine installed on my A-pillar in my Reader's Rigs gallery.
Also, you can overlay the new pillar on the OEM pillar, but I wouldn't recommend it. Just remove your old pillar, drill a small hole at the top of the new pillar and screw it to the frame with a screw. Use a black screw or paint the head and you'll never know it's there. Plus, if you ever want to take your gauges out, you have a good pillar to put back in place.
JM