Going with F350 blocks on the rear of my truck and finding conflicting part numbers

I will need an F-350 u-bolt, long bolts for both the overload spring pack and the 4 inch block

Anyone got a part number? Sterling axle from a SRW

Thanks in advance, online Ford parts dealers dont show a part number, and the searches on other sites show part numbers that dont seem to make sense

If anyone has done this to their F250, and had the overload (helper) springs, I'd surely appreciate the u-bolt part number

Thanks!