Where to get soft touch feel keyboards like 1990s HP XT PCs?

I remember typing on the HP XT keyboards from 1992 or so. They were soft touch with no click, you just go all the way down smoothly if you push hard. This would allow one to type silently without causing the keyboard noise.

Where can I find such type of keyboards?

EDIT: I bought the Dell KB216 and presently am happy with it. Let us see how it ages.