front spring u-bolts?

Hi all. So just spent last 12 hours getting all the various parts of the front axle ready for refitting on my 1977 series 3 swb petrol rebuild after last two weeks. All went well, including re-manufacturing flexi-brake brackets, shims, kingpin tab washers, and a host of other stuff. Put springs on first, then had intention of mounting axle tube then diff and finally rebuilt swivel hubs et al and found the blasted u-bolts were too short for the springs (9 leaf) I had bought. The previous owner had only 7 leafs on!
Anyway after much trawling through sellers with many types, I would appreciate any help with the ones I need .
Cheers in advance.

1 tonne bolts fit all but don't buy the Brit part ones they snap

Thanks for the advice Doctor.