Take an in Warranty repair and do it myself

I have, under my care, an X260 laptop which has sustained damage to a coer of its casing. It does not appear to have affected the operability of the laptop. I submitted a ticket to get it repaired under the warranty but it comes back as a Depot repair. I have a hard time separating the employee from the laptop, especially for an indeterminate amount of time. Is not the bottom case just a shell? Can I contact someone to just get the part sent? I feel confident I can do a bottom case myself.