Bunk with a double

[LushLemonTart]

Can anyone advise where to get one? I've looked online but there's so many. Bottom double needs to be OK for occasional adult use.
Have you bought a decent one? Preferably wooden.

We had one and I'm fairly sure it was from Amazon. Was for 3 kids but I frequently slept on the bottom with one of them as our non-sleeper would go in with dad.
It was wooden, plenty sturdy enough and cheap, and is still in use now as a friend had it, so maybe 8 years old.
I'll check order history to see if I can find the model/seller

https://amzn.eu/d/geCrDOk

Found it! I bought in 2015 and they're still selling it.

Thanks so much