on my way home coming from buying my supra everytime i hit a bump i noticed the targa top would rattle and was loose. i pull over and go to tighten it. the two front screws were tight. i look to tighten rears and they are completly missing!!??? so it jus comes loose after like 5 minutes of driving and rattles horribly on bumps. how can i get those bolts back in. and im guessing ill be heading to toyota to buy the factory screws. any input would be helpfull thanks in advance