Mono borescope: https://www.amazon.com/Handheld-Microscope-Inspection-Illumination-Including/dp/B078DZ9KPV/

'Polish' / Cleaner box: (stroke one direction only and do not twist or rotate) https://www.amazon.com/FiberShack-Cleaning-Single-Optical-Connectors/dp/B07CPCSV25

Stickler Kit: https://www.techni-tool.com/product/565IE005-MCC-FK05

I don't particularly recommend that borescope, but it's along what you're looking for. No pun intended.

The stickler kit is more if you're working on panels, or have older panels with no covers or are sitting in a poor environment.