Referencing article: Child car seat safety in an E30 Also fits with this roll up sunshade: BMW E30 Roll Up Sun Shade Blind Works with 3rd Light and comes with Magnetic Hooks Important Note:I’ve made these custom anchors available for purchase, but please understand they are entirely experimental. They have not undergone crash testing or regulatory approval. If you choose to buy one, perform your own thorough risk assessment and make modifications aligned with your personal risk tolerance.   Price – $150 + $8 shipping to US/CAD. Includes top tether anchor made of 4130 steel, powder coated in black, with one washer and one bolt. Use this link for if you want two shipped to US/CAN:   Price – $150 + $20 shipping to globally. Use this link for if you want two shipped globally: