MG, I just spent the last 9 months dealing with contact in that area of the club face. The fix for me had nothing to do with club fit though. I had an issue with a subtle, but deadly, over the top move going on that was just killing me. Contact was consistently towards the heel and it wasn't uncommon for it to venture on to the hosel. I went from mid-low 80s in the spring to praying I would break 100 in the fall.
For the last couple of months I've been doing a lot of drills to get my hands to drop into the slot and my contact has drastically improved. Went out last week for a round and hit my irons better than I have in about a year. My driving was crap and my putting was mediocre at best but I did manage to break 90 from the "tips." (muni course so the tips are only like 6800yds).
Anyway, about you; I'm not convinced the sole marks and the club face are necessarily related. Take a look at your swing and see if you don't got something else going on. Just a thought...