Keeping our prestige border

So I finally hit lvl 200 and I love that the border matches perfectly with my icon. Sadly I see that there is no way to change to past borders and once I reach past 225 my border will be gone. I love how we finally able to pick our profile background and would love to see a way to implement a way to choose our past borders besides just flexing our Rank border or current prestige lvl that we can't change.