95 explorer eddie rear axel removal

I have a 95 explorer and am trying to replace the right rear axle seal. While trying to remove the bolt that holds the pin in the rear differential i found that i was not the first person to be into the rearend. The bolt is broke in half I remove the first half of the bolt just fine. I cannot remove the pin until the second half of the bolt is removed and therefore cannot replace the rear seal. I dont believe there is enough room to extract it with a broken bolt remover. This has proven to be very stressful. I am half attempted to put it back together and see if I can find a place that will give me a quote to fix it (but of coarse not many places will work off quotes). Anyway any help will be greatly appreciated hopefully i can get this taken care off seeing I just spend $800 dollars in new tires and it is sitting apart in my driveway.