Where to buy new engine 5.9 Cummins

Well I was taking to the shop to have it checked as some suggested it could have been a bad injector and it was not that as it threw a rod through the block. I never noticed oil pressure drop either before the knocking and I checked the only 2 weeks ago however I did notice a new oil leak the other day. Anyways it is at the shop now and will will have another engine sometime soon. I will let you know how it all turns out. I looked at Cummins as they have a Cummins dealer here and they want 7K for a long block and 12K for a drop in and it could take a couple months as they build according to your ESN. The tag on the valve cover is a Mopar tag and says remanufactured parts and has a serial# and date of 2008. I had to replace the turbo and exhaust manifold when I got it and various other small things I don't think whoever had this truck before took care of it. I need this thing within the next 23 days as I am retiring from the Army and will be attending training in CA soon.