Paul-Son made them through their Authenic Products division for the movie "The World Is Not Enough.) A Paul-Son salesperson gave me my set. They were sold on a web site. If I remember right the price was reasonable.
3 chips - 43MM

The 2nd set (scan below) was made by the Production company Eon Daniao LLC - Inkworks and distributed to the cast and production crew.
1 43MM chip and 1 50MM chip.