If that is the case, I would dig around and find an OEM one, rather than getting a hood and then having to get a lens cap as well. I have no idea if this website is legit, but here is the hood that you need. Canon D52 0380 000 Lens Hood for XA20 | Full Compass
Its a 58MM hood. Here is link for one on EBAY, should be able to search for more. F76 Flower Lens Hood 58mm for Canon HF G10 HF G20 HF G25 HF G30 HD Camcorder | eBay