Need Aluminum Drive Shaft

I have a K2500 1999 7.4L Automatic 4WDQuestion:  I have a 1999 K2500 crew cab short box Chev 4X4. It has had a vibration in the driveline since I purchased it used 8 years ago. I have had the driveshafts balanced, I checked the opperating angles of the u joints, hanger bearing replaced along with replacing the u joints. I was made aware that this is an ongoing problem with these trucks and that there was a optional 1 piece aluminum driveshaft available which is no longer available through Chev. Is this something that can be built by provenforce? Any help or suggestions will be greatly appriciated.Answer:  We can provide  brand new aluminum shaft fabricated in our shop to replace your existing shat.  Depending upon what joints from you existing shaft we can use the cost will run between $500. and $600 plus freight.  See the other driveline and drive shafts  assemblies we can provide on our site.