The webbing can be found on amazon. I use these for my replacement belts and straps for gear.
Grosgrain Ribbon 1/4 Inch 10 Yards, 65 Colors
Grosgrain Ribbon 3/8 Inch 10 Yards, 65 Colors
One thing I can't find is those 1/6 scale paracord buckles in 10mm or lower ever since goodstufftogo shut...