It is possible that a sure grip out of a Jeep Cherokee or a Dodge Dakota 8.25 will fit,, so perhaps check out the local pull a parts,, but I may be completely wrong so check that out first.
There is a seller local that has an 8.25 with 3.55 gears that is from an XJ and is a 29 spline. Just don't want something the requires too much modifying.