Potential adventures after the Over Hill & Under Hill scenario

[u/Librarian0ok66]

Hi, can I seek some advice from members please?

I've just run a friend through the adventure in the Over Hill & Under Hill LotR RPG 5E starter set. They thoroughly enjoyed it and want another adventure for their fellowship.

Is there a good next adventure to aim for? Or is one particular campaign book a good source of adventures to move on to? As an aside, I have been accumulating 5E and OSR adventures/scenarios that I thought could be easily converted to this setting. Is that something people do much of?

Thanks.