Sounds likely that you have two issues happening. First...the top. You will need a new one. You can order one over seas (Wales) from BAS International. They are not quick. Can take about 8-10 weeks to get here. Cost about $800 shipped. Or you can buy one from a USA dealer for about $1200-$1400. Either way you then need to have it installed by someone. Second issue is dealing with the water in the trunk. If it got a lot of water in there then chances are your central locking pump which is located in the bottom of your trunk is now bad. You can buy used ones to replace it with but will have to shop around for that. THEN again you will need someone to install it. You can save some cash if you do all the work yourself but if you can't then expect to pay someone for that. There are a few people that travel around the country working on Crossfires. Brian Hoffman is out of Florida. He might be able to help you. He travels a lot doing exactly this kind of work and is a dealer for convertible tops.I know he is in the Facebook groups but unsure if he is on this forum. Good luck and I hope you can get your car back on the road soon.