Reading Dave Osborn's post about tracking Frearson Drive hardware it reminds me of the problems I've had trying to track down number 7 brass slotted screws longer than one and one half inches... I am trying to keep the hardware on the boat I'm working on original. I don't want to open the holes in the inside rails ...but I may need to use 8's. Brass slotted 1 3/4 are are available in 6 and 8 but not 7. I would use Silicon Bronze but they are also skip over 7. Does anyone have a source or absent that, any idea why the screw makers skip over this size?