Why look for a smith person in your area? Your 5906 has a lifetime warranty....call S&W first and then send it to S&W and let them deal with it. Not only do they issue a call tag for shipping and return it to you No Charge, they will make sure that it is fitted properly. And then you have the piece of mind of knowing that it is right and from the factory. I always ask them to make sure that the gun meets or exceeds all S&W specifications for safety before returning it to me. I have yet to wait more than 10 days....
Randy
BTW....Fastbolt is dead on right with his explanation...you can take his word to the bank!