If you want smaller thighs, stop doing squats and packing more muscle on them?? Is that not obvious or have i misread your post?
have you considered the late great gastric band
They've had 10kg barbells at all the gyms i've been to, should be manageable
squats are squats..! Lunges are good for what you want to do also. you use dumbbells for squats and lunges but a barbell for squats to.
It'd be helpful to visit another forum too as all anyone is going to tell you here is to Squat.
Oh, I mixed this thread up with another one. Yes, for bum and thighs, squat is king.