It takes the same forend that's on your 243 Ultra, just add the forend to your barrel order. Most stocks are listed on the Retail Parts Price list page in the FAQs, be sure to specify that you want the checkered forend on your order if that's what you want, I think the cinn lam forend on the list is uncheckered, but if you list the description on the order form as
forend, cinnamon laminated, checkered, they shouldn't have a problem. Don't send the forend with it since you're ordering one. I order complete stock sets when I order barrels, I just send the frame in. You could call and ask them what the forend part number is, hopefully the new CS will know.
Tim