may wanna PM Travelin2. He's the one that added a disconnect to his driveshaft for towing. He's prolly got more experience with the driveshaft than anyone.
You could also PM Marlin. He found a cupla VXs in boneyards & could help you contact the right person.
Billy's right. You may only need to remove the driveshaft & take it to a specialty shop to be balanced. Then reinstall with new U-joints.
Let me know what you find out, I can get the one here, it only has like 80K on it. He is reasonable with his prices, and shipping for the U joint wont be bad, 15 bucks for USPS flat rate. If the whole shaft, I will have to look into the price. Let me know.
I predict future happiness for Americans if they can prevent the government from wasting the labors of the people under the pretense of taking care of them.
Thomas Jefferson