While I haven't heard of a permanent fix as of yet (some people are suggesting relocation), you can get them cheaper through Cummins directly ( part #3990105).

I believe I saw around $149 for a new one through Cummins.

Another aspect you might want to consider is adding a gauge to monitor this. Won't solve them going out, but will help with preventing failures of the VP44 from driving with a dead one.

You may want to read up more on the issue @
http://www.turbodieselregister.com/f.../forum/13.html

I know there's been a lot of discusison on there about the lift pumps and their failures, but since I sold my Cummins, I haven't been there much lately.

Hope this helps.