I got them from a guy in Poland. He was a PITA to work with too.
http://moman.eu is his website, but make sure you know exactly what you want before ordering, and don't ask too many questions. I was working from two different gauge clusters. I used the pictures from the one installed in the car, and scanned the gauge faces from a mockup set. He was really angry I did this since the were some minor differences between the two. I tried to explain that I wanted the faces based from the mockup set, but wanted it to look like the cluster I have installed in the car. The ones I have installed in the car are from a 968 and doesn't have the boost gauge (seems silly to me to have two boost gauges). The tach and speedo tick marks are slightly different from the 951 gauges.