I need to make a bunch of tongue and groove out of 1/2"x3" stock that I have. I have ran 5/4" tongue and groove with the moulding head and it worked great so i want to do the same thing again. Problem is i can't locate knives for the thinner lumber. I would need the tongue and groove to be no bigger than 1/8". It's the moulding head that fits into a table saw. I checked corob and all they have is the 1/4" sets. Is there a company that will make custom knife for it ?