Lower rez
http://www.a2retrosystems.com/images...mill_drill.png
Slightly better looking but larger file size
http://www.a2retrosystems.com/images...mill_drill.bmp
1.5" x 1.5"
155/3 = 51
180/51= $3.52 per board plus pins or sockets
quote from GP
2 layers 0.062", FR4 1oz HAL 1.5"X1.5", 5mil clearance, 8mil hole.
$99 + $40 (for 5mil) traces + $40 for 8 mil hole total USD169 or CAD175
Would be $3.31 per