but has there not been 2-3 pages of people saying they make their own sticks..or am I missing the point?
I personally make my own twins from B&Q canes with pipe insulation at the tips, but use an 8' single hazel stick on the hill. Hell, I even have made and use my own bipod from two thinner 10" sticks, so I don't need to 'wear' a bipod but can use them if/when as they fold and sit in my leg pocket of my trousers. I tried doing the small bipod, but it kept collapsing, any tips?
yes

you need to have the legs pointed and sharp in the tips so they 'grip' the ground, also if more is needed, put a bit of string halfway down so they can only collapse 'so far', in case they do slip.
I have found though, that with the legs being quite pointed in the ends, which can be upkept with my knife before a stalk, they stick just fine. on a carpet in the living room to 'test' them, they will collapse like a drunk dutchman.