Well, they weren't anywhere I could reach in the linen closet (which isn't saying much considering my height. |D) but they could easily be in a for sale bin in the garage.
When my mom gets home from her state mobility (huge 8 mile fire somewhere up north...) I'll ask her to get them down so I can look for you.
But! I did find my old Gryffindor cloak. XD
I bought it in South Carolina during Halloween.
It's too short for me now and has been sitting in a box in the guest bedroom closet with my other black cloaks.
So far, it's $17.75 total.
Once you are finished with gathering up what you want (maybe even up until K-Con itself? XD), we can haggle prices if things get too pricey for you. ^^