Best shot off the top of my head is
here.We have two, I don't remember the model of the small 4" screen but we have a 65LM. That one is in the DW's car the small one in in the Towed. I went and looked and the 4" is a novi 2555 LMT.
We're pretty map savvy and do not rely extensively on the GPS. In our rig, the DW sets her's up one way and I mine with different parameters. I really use the speed function because sometimes the speed limits change quickly.
My model 65 was reconditioned and less than $100.
The link I gave does ship all over.