Disclaimer: I'm not an engineer, but I play one on TV!
Very unlikely, as the 8VSB modulation standard is not common. Even if you could do that, making a unit compatible with the Dish 5000 satellite receiver makes it even more unlikely.
I would think the only possible way would be to copy it, chip for chip, circuit for circuit. I don't have a clue if this is feasible.
------------------
"better living thru modern expensive electronics"
tm