Where can i buy aditional weight for the end of my 30" stabilizer?

It has a 1/4in male end
any websight would be great.

Does doinker make any that wold be appopriate for me?

Any sugesstions would be great

thanks

What type of stabilizer is it? I have a 24" Superstix, I added weight by making a trip to the local hardware store. I got a couple rubber plugs, a brass screw, a nut and some o-rings. I drilled a hole thru the rubber plugs, pushed the brass screw thru, put the nut on to hold it together, and put it on my superstix pushed all the way to the fron end. I then put the o-ring around stabilizer. It works great.