It's the 1611 version of the king james bible that is the right one. Not the 1769 version. So you should buy the 1611 version of the Authorized version (AV).
Often you can find these bibles in your national internet bookstore. Search on ISBN number. First find the book on the international publishers homepage. Take the isbn number and put it directly into google or into the search field of the national internet bookstore.
The bible you need is also available for free on the internet. It is the 1833 edition.
One exception to this was a scrupulous original-spelling, page-for-page, and line-for-line reprint of the 1611 edition (including all chapter headings, marginalia, and original italicization, but with Roman type substituted for the black letter of the original), published by Oxford in 1833. --- Wikipedia
Here are links to it:
Here is another link to it:
The book that you can buy on the internet :
King James Bible: 400th Anniversary Edition [Print Replica]
by Gordon Campbell (Author, Contributor), Oxford University Press (Editor) (Hard Cover)
contains the 1833 edition of the king james bible.
So i recommend that you buy that book.
It is available at amazon and also at oxford university press and many national bookstores as well.