Bullet design is 100% the customer's responsibility.
Record keeping is 100% the customer's responsibility.
I am not a secretary. I do a lousy job of keeping records for my own personal bullet designs and loads. The suggestion that I should keep records for the general public is ludicrous.
If someone wishes to share his design with the public, he should post a copy of the design page on his favorite website or forum. Then, anyone can print out the design and mail it in with his order, providing the old design is still compatible with today's online design program.
However, the online design program is constantly changing. There is no guarantee that a design that Mountain Molds made years ago can be duplicated with today's online design program.