We carry a KZ-499A shock which is used on the rear forks of MAD scooters. Here is the link to it:
SHK-KZ499A: https://cart.electricscooterparts.com/kz-499a-shock-for-electric-scooters
We do not currently carry a front fork shock for MAD scooters such as the KZ-590, however, we are looking for them and will carry them as soon as we can find them.
We just found a supplier for the KZ-590 front fork shock. Does your front fork shock absorber have a LBS/IN specification on it?
We can get KZ-590A shocks with the 450 lbs/in spring rating. Here is the link to it.
SHK-KX590A: https://cart.electricscooterparts.com/kz-590a-shock-for-electric-scooters
We were only able to find them in black. We were not able to find them with the silver finish like in the photo you attached.
I just checked and the rear shocks are only available in silver.
William Salazar