My bassinet is an old family one and has nothing at the "head" end. I did buy a crook which clamps to the end and holds a mosquito net which dresses it up. I sewed lace to my net which matches the lace on the bassinet skirt.

I can't remember where I bought the crook from, I think I bought it for DS1, so I've had it a long time, but you could try baby shops. It's just a simple metal bar (like a L shape with a bolt/clamp attachment.)