1.25 inch short rack and pinion focusser

I'm looking for a short 1.25 inch rack and pinion or crayford focusser, preferably good quality. A helical focusser won't do. Do you have any thoughts or know where I can get one please?

Many thanks

JMI makes one called the Monorail. I have the 2" version that racked in is just under 2" off the tube. I believe the 1.25" version is about the same. They are less than 100.00 and of very good build quality.