you can find them just about anywhere. i even found the clips at walmart. just look for paracord buckles. They are usually with the paracord rope. i have a tutorial up for it. it won't let me post the link to it so just look for paracord buckles under the tutorial tab.
with my alphas i do not use the base strings to tie knots. so i take 25 base strings (they can be any color because you are not using them to knot)and i lay them out. in alphas its all forward knots a row then backward the next row so you dont have to set up strings. i hope that helps