Trimming D2 front springs

Im about to fit a HD bumper, winch and steering guard. All in, a fair weight. I dont want a lift and i would like the front to sit at standard height.
I have a new pair of LR springs to go on and dont want to fork out for the pink ones to compensate for the weight.
Does anyone know of a small trimming plate or shim to fit either end of the spring to add a few mm as required? It seems to me that a thick steel or rubber donut in between the isolator and spring may do this? Or does anyone do a plate at axle end to add a few mm?
Any help gratefully received

There's a 10mm steel & rubber packer / isolator used on the top of the front springs. It has rubber castellations on the inside that locate on the spring support on the chassis. If you grind the castellations off you can locate an extra isolator over the 1st.
I've done it ours to fine tune ride height.

PS you can't put anything between the bottom of the spring & the spring support due to the offset spring leg that locates in the depression in the spring support pan.
The only options to go underneath the spring support pan are either 40mm or 2 inch thick to create more significant lift !

Thanks Pawl, that sounds like a good plan. Ive got a new set of isolators to go on so can butcher the old ones coming off.
Much appreciated