I have a 2007 Supra 24 SSV and I need to replace my brackets on my swim platform that mount to the boat. I found the brackets online but it looks like there are 3 different types. They are 90,95, and 100 degrees. I don't know exactly which ones I need to get. I still have the old ones and they are not 90 but I do not know which one to get or where to find out where.