I have been through serious bouts of this with both elbows. I have every grip/forarm device known to man. None of them worked for anything other than rehab after surgery. My forarms are pretty jacked though. I doubt I will have any elbow problems in the future. Expand you hand bands from Iron mind should be your first purchase once you have some relief. Don't mess with any of it until you have some relief.
I would start with a cortazone shot. This will fix the problem. The question then will be whether or not the pain (inflamation) comes back. For some people this does the trick. I went back for several of these. They only provided a couple months of relief but it is the easiest to try. Go to a really good ortho for this. Injecting shit into your elbow is painful. It's tight joint, so you'll want someone that knows what they are doing.
If that doesn't work, I would find someone that does prolotherapy. I did this after surgery on one of them failed to work. Insurance didn't cover it but it was worth the small fortune just to get some relief. This was after at least 3 year of constant pain in at least on elbow, even after stoping all lifting. Not a pleasant process but it worked for me after about 6 sessions. Make sure they have done tight joints before like the elbows, wrists, fingers, etc. You'll want someone that knows what they are doing. The elbow in not like shoulders or knees most people deal with.
Surgery sucked. Did it on both. Lateral release is what is called, I believe. This worked for one of mine but should be your last resort.
Was also going to try some sort of electromagnetic shock therapy if the Prolo didn't work. The same thing they use on heal spurs or someting.