try taking a look at one of these

www.rrarms.com go to the link that says rifles , and on that page when it comes up click on the 7.62x54 link in the center box

or try this , it might take you right to the page
http://rrarms.com/catalog.php?action...p;cali=7.62x54

the fourth one dowm might interest you , however it is 4 foot long which is only 3 to 4 inches longer than a modern sporter , it could always be sporterized.

obviously , itwould have to be sent to an ffl dealer near you who could get a gunsmith in touch with you for such a project