My DSi XL case is almost cracked :(

I had this Nintendo DSi XL for a very long time, 6 years total. But i am worried and i now think my DSi XL will die one day, because the hinge breaks. But everything still works fine! I still hear the hinge sound when i open it. But this DSi XL seriously needs a shell replacement... Since i was even more younger i wanted to have a burgundy color, but no! I got a midnight blue instead. Now i dont really know, i want a link to a good quality DSi XL burgundy shell on America. Hope its 7 years.

If you want to see the dirtyness on the L button, see here below:

If you want to see the crack on the shell, see here below:

Please help me to deal with it.

NOTE: The fissure is small, so it cant really be seen!