Cost of Surgery to Produce Monolids for the Eyes?

Unfortunately, I am not aware of any techniques that reverse the double eyelid and convert it to a single fold. That being said, you might wish to consider Dr. Stephen Park who has written some articles on Asian eyelid blepharoplasty. I am not sure of his location but you can probably google the information.

Unfortunately, there is no technique currently available that can create a monolid. There is only a way to create a double eyelid. 

You raise an interesting request. For the longest time, surgical techniques for doing the reverse have been taught. To the best of my knowledge, I am not aware of any surgical procedures. I could theoretically device one by detaching the fibers that create the upper eyelid crease but it remains theoretical and I would not advise it. I look forward to other surgeon's responses in this regard.

It is not possible to remove the fold from your eyelids to create the results you seek. There is no surgical procedure in the world that can make that happen.

There are operations to westernize Asian eyes but none to remove the fold. You have beautiful eyes and I know of no reputable surgeons who would touch them.

No known surgical techniques exists for the issue your are concerned about. I am concerned of your realistic expectations in requesting this type of surgery. Maybe you should seek additional in person evaluations. 

With the exception of silly WWII B grade Hollywood movies demonizing Japanese agents - I know of NO successful operation which would accurately and successfully remove the Western upper lid crease in favor of the oriental nearly crease-less lid.
The crease is formed by the skin insertion of the muscle responsible for lifting the eyelid. In oriental eyes this attachment to the skin takes place much lower and as a result the fat makes the eyelids look fuller.
While a crease can be created (Oriental to Western transformation) by attaching scar tissue to the skin at that level (a few stitches), removing the attachment a western lid has results in new scar tissue which IN THE BEST circumstances may be the same as before surgery - odds are greater that the new fold though would be irregular and asymmetrical.
Finally, I think you have GORGEOUS eyes and cannot for the life of me understand WHY you would trade them in. A LOT of women would kill to have your eyes! You REALLY need to re-think your game plan.
Dr. P. Aldea

 There would be no way to make the changes you desire unfortunately.  The reverse operation would have been possible and is called a double fold procedure but your eyes are locked in where they are.