Done Magma slime islands not spawning?

So i've travelled thousands and thousands of blocks in the nether and i haven't seen a single magma slime island. It might just be my bad luck. But as far as i remember, the spawning of these islands was disabled in some modpacks. Could that be the case with this server or am i just really unlucky?

 

What do i do then? Where do i find the items i need?

 

What exactly do you need from the islands?

 

Congealed magma slime blocks.

 

Found your last thread for this issue and the information on the magma slime islands seem to be conflicting, and was never actually answered with a solution. Sorry about that!

I've added recipes for the Magma Slime Ball, Magma Slime Dirt, and Magma Slime Sapling. They should be there on the next restart. Thanks for your patience!