YES...You can replace the plastic parts on your new H001. You can order metal replacements directly from Henry. These are not STEEL but are painted metal and match the receiver of the H001. There are other options as described below.
After trying the Williams Fool Proof on my H001 and finding that the factory sight was too short and that there was no easy solution to replacing it I starting looking for other options. I wanted something that did not require any drilling, tapping or machining. I ended up going with a Williams WDOS dovetail base to replace the factory rear buckhorn sight. The base comes without a sight blade so that you can choose the blade to suite you best.
http://www.midwayusa.com/eproductpage.exe/showproduct?saleitemid=211355Williams has blades in various notch configurations. I went with the 3/16” “U” notch to mate with the white dot front sight. The factory white dot front sight is the metal replacement from Henry ($10.00) and, to me, is better than the supplied plastic sight.
This link shows the 3/16 “U” notch that goes with the WDOS base, but when I ordered this from midway I actually got a 3/16” “U” notch blade and base to fit a Williams WGOS which is a little different but I just removed the base and used the blade.
http://www.midwayusa.com/eproductpage.exe/showproduct?saleitemid=475030If you are using the factory plastic sight you may want to order the square notch blade.
http://www.midwayusa.com/eproductpage.exe/showproduct?saleitemid=132349In either case I recommend the 3/16” height unless you have your factory sights elevated very high to get zeroed. I am using the 3/16” blade and have the base nearly bottomed out. It is nice to me because it that way the sight is as low to the gun as possible and less likely to snag on things.
Ghost Ring option that will work with the base above. Not sure how this will work with the factory front sight.
http://www.midwayusa.com/eproductpage.exe/showproduct?saleitemid=496762If you want a rear fiber optic sight, then any number of the Williams rear blades like the one in the picture in this link will also work with the WDOS base.
http://www.midwayusa.com/eproductpage.exe/showproduct?saleitemid=119767I hope this helps people like myself that want to keep a sleek iron sight set up on their H001.