You might check if they have a mount for the C8 for the top. If they don't, you might as well get a local welder make one up for you. Last, but not least is to buy another wedge which you leave on the pier. If the pier is out in the weather though, you don't want an aluminum wedge out there as they aren't waterproof. Be careful as you might find out that you can have the complete pier built locally just the way you want it for less than getting the Astro-Pier - but then again, you won't have an Astro-Pier.