First of all great customer service, i hope you provide them with a mailing address and get a new set of precuts....
I do save my receipts on anything 'big' or 'mechanical'....what I do is scan the receipt into my computer and then save it in a special file.....after having to produce a couple receipts and spending far too much time in the search, this is what I came up with....Also things that have instruction books (like a sewing machine) I will tape the receipt in the back of the book, and any repair receipts I might acquire .....
Works for me....