You will find a lot more 10" wide options out there (to go square) but there are some manufacturers making the 9.5/10.5 replacements for Ubers that you could just buy 4 of the 10.5. There's also been some folks evening out their 21" Ubers for trade to get squared (someone keeps the fronts, someone keeps the rears - but not a lot of pics afterwards).
For a 10.5, its really going to come down to the offset, I know our 10's seemed really close to the bits in the front with a 40 offset.
You could try jacking up one side and swapping your front and rear just for some low speed cul-de-sac turns to see how it comes out (dont drive anywhere non-safely via this method).