Bracket # for 12-disc CD player for my 98 TA; GM# 25678544.
 

Need part # for bracket or bracket to mount 12-disc CD player for my 98 TA; GM# 25678544.

Mark, just saw your post on this. I don't know if you found an answer yet but here are the numbers I found: Long Bracket mounted (Welded) on rear floor-10276577
Left Side Disc Changer Bracket-10274252
Right Side Disc Changer Bracket-10274254
Plastic Nut-10027015

You will need a hex nut (M8X1.25) to hold the changer bracket (10274254) to the long bracket (10276577).
Most if not all of these numbers are discontinued but you may get lucky and find them in a salvage yard or you can try and fabricate some mounting brackets yourself.
Good Luck