And here's a Remington Model 11 owner's manual explaining the recoil system and how to position the bushings for light or heavy loads.
http://stevespages.com/pdf/remington_11.pdf
Reportedly, Browning A5 wood and most parts will fit.
Here's parts and wood for the Model 11:
http://www.gunpartscorp.com/Manufact...6/11-41186.htm
http://www.poppertsgunparts.com/cgi-...a_gunparts.cgi
http://www.gun-parts.com/remingtonshotgun/
(They possibly have original wood)