I will be installing eibach Sport lines soon but my bump stops are totally worn out , which are some good replacements .I've seen a lot but don't have the same shape and say they're "universal" would those be ok?

OE rubber replacements are available from such places as RockAuto. You might also check at an auto parts stores.

JamesC

Also, depending on how much the car is really lowered you may need/want to cut the stops down some (but keep the same profile) to keep more of the range of movement without hitting the stops all the time.

The fourth gen z28, not SS rear bumpstops are a foam type and would be a worthwhile upgrade.

Up front you can use a shaft mounted bumpstop from ground control. I'd still cut them down but you can regain quite a bit of travel that way.