The mounting hardware that came with my Koni's for the fronts used rubber washers to center the bottom of the shock studs in the spring seat.
There's an issue there with that.
The holes provided in the spring seat for the shock studs are 1/2". The od of the studs is 3/8". As a result the shocks move too much in the seat.
OTHER THAN replacing those collared rubber washers, is there an alternative?
I'd actually consider it an adapter. A stepped flat washer with a 1/2" collar machined into a 3/4" washer.
If I had my choice, I'd look for delrin but I haven't found anything yet? Anyone?