Jim,
Part number 5134428-00 is still available. This will need to be ordered through TVH. This is an aftermarket parts depot. There is another one, but that has 12 springs not 9.
The lift you have is a G83C or P or a G51C or P, C for cushion tires or P for pneumatic tires. This can be air filled or solid rubber. The lift can pick up 3000 to 10000 pounds depending on the counterweight. Good Luck
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