Replacing a 3" body lift with a new 1-1.25" body lift would be the easiest swap, IMO.
The new kit will come with all the needed and correct grill supports, bolts, spacers etc.
Plus, a small body lift still benefits if you want to tuck your transfer case skid later, if it isn't already.
If yours is already tucked, you may have to get one anyway.
Your 35's will still fit fine. I'm running only a 3" spring lift, 1.25" body lift, and 35's.