If you always carry weight then fixed rate heavy duty springs will sort you out
https://www.classicswede.org/shop/hd...=6060e3abd7a69
if you are sometimes empty and sometimes loaded then the progressive springs will be just the ticket
https://www.classicswede.org/shop/pr...=6060e3abd7a69
If you want new standard springs the nearest you can get are a little stiffer and lower about 20mm so you either have to swap the fronts to match or add the spacers