Phono preamp with mono switch?

I'm looking for an affordable phono preamp (let's say less than $1,000, with less better, of course) that includes a mono switch. I don't need all those fancy EQ settings, as I won't be playing pre-1957 records, but I'd really love to get my hands on a decent phono stage with a mono button.

New or used would be OK, and good sound would be great.

Thanks very much for any thoughts, any suggestions, any contenders.

-- Howard