Thanks Jim,
Here's the link to all of the 914 calipers:
http://www.pmbperformance.com/914-brakes.htmlWith the 48mm pistons and large pad up front the VB914-6 or a stock 914-6 rear caliper would be a perfect match bias and pad wise. This would give you a 38mm piston in the rear which would be the same as a 911RS, early 930, 911SC and 911 Carrera pad and piston size all around. Your bias would be 1.6:1 and perfect for what the factory established for the car.
We have two pair of original -6 and -6/GT calipers for $1,200 and $1,500 respectively as well.