Base-Line LASER-520700 substitute

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1. We normally use Base-Line LASER-520700, but are no longer able to find it.
Does anyone have an equivalent or better substitute?

2. We also need a Laser Plate Deletion Pen. We are currently using LASER-5501.
Does anyone have an equivalent or better substitute?

We are using Hurst plates - double-sided CTP on the HP5100.