Collectables that Do Not Respawn?

[ChunkyChimp]

I'm making a fairly large level that has 4 parts, and at the end of each part I wanted the player to collect or trigger something that would cause an event after all 4 items are collected. However, because the level is so large, there are checkpoints and the player will likely die. I can't use the card switches because those are already being used in previous levels for my episode. Are there any ways to make collectables that don' t respawn or reset after deaths?

[Emral]

The SMW Star Collectible has these properties.