Plenty of gear drives available...not so sure about a chain.sprocket set up though..

Id try Wizards first.. This is where I do most my gett'n stuff at. Tell'em Bill in NY sent you!
RBS sells them Too

'01 P1500, Blown/Inj BAE,/Veney ,Bruno/CS2,Dana 60
'01 Dodge 3500 S Cummins Auto, Fresh air kit, 4" Exhaust,
'05 Dodge Magnum R/T - Too Much to list
'60 Willys CJ5
'01 International LPX - Project,DT466, Allison
'64 Plymouth Valiant, Inj 528 Hemi, 2spd