It's going to be a custom fit no matter what route you go, either a custom built one or a donor radiator.

I have a custom radiator from Bryan McCulloch at alumrad.com It is designed for the 6 cyl. YJ and it came with brackets, but it may not work for you. I'd give Bryan a call and see what your options are.

91 YJ
2 Seater Sand Rail
Handfull of other fun toys...
And a brand new, spit shined, B.S.
Oh, and a job to boot.