you really don't need one, but if you really think you do- put a thick cable tie around your spreader bar (just below the hook), cut it to length, and push it through the hook and chicken loop.
Cable tie, or just loop through one end of the hook-just check that it pulls through easy if you need it to release- this'll make sense when you try it and see the two options. This also means that you check your release every time you set up.
Having no donkey dick is fine if your un hooking all the time but believe it or not we all dont un hook. You can buy them with a piece of velcro on the end that you just attach. They are on Slingshot bars. Or use a cable tie like suggested.
go to your local clark rubber or any rubber shop. and get a bit of tubing that is just bigger then your dockey d!ck. then just spray the old one with WD40 so the new one slides on easy then when it drys it wont come off. WORKS WONDERS!!! mine still hasnt came off!
They are a regular spare part. We have them in stock. Universal (velcro) type ones fit most bars. Those that universals dont fit probably have their own branded replacement part.