The 3.54 is the lowest gear currently produced. There are no 3.3x, or 3.0x gears available from anyone that you can buy new.

Your options are to try and find a used 3.3x or NOS gear most recent like that is the ford 3.33 from the early 80's.

or

Take a 3.07 gear out of a D61 (1/4" offset pinion D60), and machine both it and the carrier to accept the offset difference. But I'm not convinced how strong that option is, because if it were that easy Dana would have done that from the beginning and not built the D61's in the first place.

Other then that, you're pretty much stuck with a F... Foooo... Foooooorrrr.... (I can't even say it).