I finally found a suitable coffin for my 360, albiet not a "coffin", as my girlfriend said that UPS might not take it if it looked like a coffin. I also decided against writing R.I.P. on the box, but I might have been able to get away with "In pace requiescat". We'll never know though, as I already sent it off.
Strangely enough, before I left the house, some old guy came to warn me against burying it in the old Micmac burial ground. He said something about what comes out ain't what you put in. I kicked him off of my doorstep and brought the package to UPS...