Spring hangers are £20 each or less, so no biggie, if you get someone around to weld at your place you could have all the work done, bar the welding. Jack the vehicle up, put the chassis on axle stands, undo the bolts, drop the axle away, (carefully) cut off the old ones, tidy up the chassis so the new one fit and clamp in place.
Ensure the weld point is immaculate and then all the welder has to do is zip around with the MIG. You can then paint and reassemble.
A days work if you take it really slow. Buy a 4.5 inch angle grinder and a box of 1mm disks, and a flap wheel, if you don't have.