What year? not that it probably matters but I want to make sure.
Picking a random year and looking in my parts catalog, for a 1997 you'll need part number 5211 8551 (PLATE, DRIVE PLATE) along with likely J321 4094 (PLATE, DRIVE PLATE BACKING) and six of J315 1407 (BOLT, HEX HEAD, 1/2-20x0.56") and four of 3420 2497 (BOLT, HEX HEAD, M10x1.50x14, TC mounting bolts.)
EDIT: mopardiscountparts.com has the plate for $90. The other MOPAR retailers will probably have around the same price.
EDIT2: for 91-92 you want part number 5300 6324 instead; for 93-95 you want 5211 7761, for 96-01 you want 5211 8551.