I had some "mice" on my last car(an opel/vauzhall),Went for a test run with a mechanic with the windows open.
The squeaking was audible really only with windows open over slightly uneven road surfaces,not single potholes or a very smooth road.
He reckoned it was bushes and wasnt much could be done about it(aside from replacing them and the noise might come back)
I wiped the dirt /dust away around anti roll bar,bushes shock bushes and pivot bushes,any I could see.
I then spreayed with a small amout of silicone spray(rubber lube )
It went awaythat summer and I didnt notice it over the winter,then I thought I could hear it again the following summer, but did noting , Either it really didnt come back or I just got used to it over time.I had the car for another 7 years after that and the only suspension/steering work done was to replace shocks.
On the + side if you have any kids /strange tastes in music ,it could provide hours of entertainment