Swiss Micros have some fairly decent recreations of HP's greatest hits. Pricey, but I am going to get myself one for my birthday.
https://www.swissmicros.com/products
I have several of these and I'm really impressed with the quality. The DM32 is nice and has a manual available from SwissMicros, but I prefer the DM42n. I had a print shop print and spiral bind an HP-42 manual for me. Works good.
Inflation adjusted they are cheaper than the HP they are recreating. Even if you don't adjust for inflation they are competitive to the old HPs in the 1990s.