I just priced the parts that I got from Bing about 2 years ago, that includes kit #6, plus all of the jets, atomizers, etc.
Came up with a 'list' price at Chicago BMW of $203.3, factor in their usual 20% discount and it comes out to about $163, plus shipping and handling.
So maybe ordering it 'piecemeal' may be a better value, as long as you can get all of the parts in a reasonable time-frame.
I was just looking at the manual I received from Bing, and on the front, it states : Sole Agent For: United States Canada South America Australia .
Guess they have a strangle hold on the market.
The parts that I ordered about 2 years ago, was only $125US, so their prices have indeed gone up !!!
I installed the alcohol resistant float kit , back in 1997, I think I paid $65US for it at the time, and I didn't think I got my moneys worth at that price.
Right now the floats are a little under $16US each, I think I would replace the stock foam floats every 5-6 years, instead of purchasing the alcohol resistant kit for the price they want for it.