The screws look like standard Torx screws.
As for the pocket clip, putting one on the side by drilling through the wood handle and liner is possible, but may not look the best.
Another option is a clip similar to the one the Mcusta Tactility. Though you would have to flatten the "back spacer", drill, and tap.
You should consider posting your request in this forum:
http://www.bladeforums.com/forums/forumdisplay.php/871-Wanted-Knifemaker-Craftsman-Related-Services
(It appears blank because you can't see other people's requests without the proper membership level.)