The following purchase is a game changer.
Sting Ray - Front Squat Stabilizer https://www.amazon.com/dp/B0017DE16I/ref=cm_sw_r_cp_api_glt_i_W3QY9Z21GRHWHRVR0JPY
I use a Sting Ray for front squats as well as a Manta Ray for my regular squats. They help me focus on form and not worry about how the bar is sitting. A bit pricey but it was worth it for me.
They make a pad designed for things like this. It's called a sting ray front squat pad