'83 430WR Pipe HELP!

Where can I purchase a new 1983 430WR pipe for my new woods racing project?
I have purchased several used ones only to find that they don't fit or they are stress cracking all over the place. I modified a used 82 430 pipe to fit, but it too has the stress cracks. It is a nickel plated pipe. I live in Wisconsin so bringing the bike to Cali is not an option.
A new '82 430 pipe would work too with some mods.
Help!

No where that I know of..
Bill

Though I don't burn a lot of gas through any of the two stroke pipes I have repaired I haven't found any new cracks after tig welding up the ones which were there. When I got my 88 four stroke that pipe had a lot of crack inch wise and I used it quite a bit and never got any more. Usually I weld them up in order to be able to blow out the dents. Tig is preferred but oxy acetylene works. How many inches of crack do you have in the various pipes? Now I found a really beyond repair pipe I think a thin ktm one in a dumpster but about six inches of crack is the most I have seen in these.

The longest crack is about 3" long across the top of the pipe where it bends from perpendicular to horizontal, at the fattest part.
I'll try to have it tigged, but AMS has replied that it has new pipes for the 430's.
The ship them with the stinger part not welded on to make them fit either 82 or 83 frames.
Does anyone have any feedback on their pipes?

I am guessing they are Proform pipes.

How are the ProForm Pipes performance wise? Top end, mid or bottom end pipes?
I know that a 430 air cooled motor has power everywhere but just wondering.
I bought my first Husky in 1983, a 430WR, I' m just reliving my childhood. LOL
I'm picking up a 1985 WRX250 next.
Thanks for the replies!