Push a frankfurter over the stick or something?
Joking asside, I have seen aftermarket sticks but they tend to be same dimensions and just anodised a different colour. There are two possibilities for you.
1, try silicon fuel line, I have done this in the past and it works.
2, get some new sticks turned at a machine shop to your own spec. This may be best idea, especially if you have a friend who is an engineer. If it works, you may be onto something new.
