I own a Canon 7D Mark II. I broke off the card slot cover and need a replacement. Where could I find this? What would it cost?
Do you have this? Cost?
I think you've got the wrong idea about this site. Photo.SE is a question and answer site, not a vendor of any kind. Nevertheless, I did a little looking around and found two sources for the card cover for a 7D, with prices in the $20-30 range. The 7D Mark II cover is apparently not the same part, and I didn't come across any vendor selling that part, but if you can find one I'd expect the price to be in the same range. (Covers for various other EOS models were also mostly under $30.)
A Canon Knowledgebase article explains that Canon doesn't sell parts online, but that you can order parts by calling Canon's customer service people. In the US, the phone number is 1-800-828-4040. I think that's probably the best bet for getting exactly the right part.