Back in rotation!
The Remotec ZRC90 is a small battery-powered zwave keypad with eight buttons which was very popular for both US and UK smartthings customers for years. You get tap and double tap on each button, so lots of options, and you can label them, which makes it more intuitive for guests.
However, the old DTH didn’t work well with the new app and it fell out of favorite for a while.
The very good news is that a community member has now created an edge driver for it, so not only is it working again with the smartthings app, it should work fine after the transition to the new edge platform is complete.
Here’s the driver thread:
New Edge Driver for Remotec ZRC-90 Scene Master, (8 Buttons Remote Controller)
It’s usually available at Amazon in the US and Vesternet in the UK, but like many electronics companies they are having some supply chain challenges these days and you may have to shop around.
As of this post, it was in stock at Vesternet, but out of stock at the first US suppliers I checked.
Remember that the Z wave frequency has to match the Z wave frequency of your hub exactly, so you can’t use the UK model with US hub or vice versa. read product descriptions carefully. 
UK: