crossmember bent?

hey umm i think i bent my transmission crossmember bar.. its the bar that goes from side to side and connects to the frame and the transmission. i have a 91 oldsmobile bravada and i think i bent it while rallyin.. i came down on something hard and as soon as i hit it it started grinding vibrating and making a roaring noise...:confused: ... and yea.. and just looking at the crossmember bar is painful-(ill post pics in a bit),

i was wondering how much would it cost to get a new crossmember bar installed and would this fix the rattling/vibrating/grinding/loud noieses thats comming from u nder the car..?
any help would be greatly apreciated
thanks

http://www.geocities.com/phattyp123/crossmember1.JPG

:eek7: :eek7:
http://www.geocities.com/phattyp123/crossmember2.JPG

you can see where i hit something in the middle ....