Congratulations for your new keris. I agree with most of what you've already said, except that from your photos the blade appear like modern blade to me (last 20 c. or even early 21 c.)-- please keep in mind this is just my personal opinion. I like the blade for what it is. The fittings could have been better but I wouldn't change anything except the hilt ring which is Jogja/Central Java style (only if I got a chance/I wouldn't pursue a replacement).
For now I think you have better chances buying from your local market
