I may have some of my numbers and facts crossed up but this is what I remember from talking with Joe and Advanced Diesel today.
Joe's mechanic got Bosch in Germany to pull some off the shelf to help them out. The #1 injector has a sensor in it that connects to the computer and has to be bought as a complete unit. Just under $500 shipped from Germany, and who know how much once it gets a coat of green paint and put in a plastic bag with a Volvo number on it.
The other 5, I saw on the Internet for $350-$600 each and Bosch offered to pull 5 off the shelf and tear them down so they could ship just the nozzles, o-rings and a washer plate he needs for around $150 each.
Going the rout Volvo has set this up, you're looking at $3000-$4000 for a set of injectors. With the Bosch factory's help Joe is looking at $1200 to get the job done.
Mike
A little more research tonight
I think the #1 injector part number is 3583074 and goes for $ 546.33 on marinepartsexspess.com
I think injectors 2-5 part number is 861103 or 3803038 if you have an exchange. $343.13 and 321.08 on the same site.