Check your suspension area on that side too along with the mount. With having the problem two months ago and doing a brake job and it fixed it makes me wonder if it might have something to do with either your wheel or your hub area. To rule out the wheel take it in for a balance, as they will be able to tell if it is warped or not. I'll also add to check your lug nuts just to be on the safe side. Having loose lug nuts can make cause a vibration in the front.