Wood extensions I have found that the more you pay the less ugly they become. The one extension up to 11/2" in my experience that does not shout at you is the black hard Vulcanised rubber sometimes called gutta-percha because they can be shaped and highly polished and tapered towards the stock edges while having the correct depth in the centre of the stock plate. As it is not possible for me to post pictures from my image hosting site. Thake a look at my posting on DIY gunsmithing "RE fitting a tradition gun case" in one of the pictures is a Webley & Scott 700 having a hard polished rubber 13/8"extension as the extension is tapered out at the sides it does not look as thick as it really is. You where able to purchase these hard rubber extensions in various thicknesses though they may now be to old school nowadays to find.
