Here at Stricken Designs we have met some wonderful people over the years who make amazing stuff that we use ourselves and we cannot recommend them enough.
3D Printed Aroma pumps and Silicone Lube at affordable prices - Slick Latex make the best Aroma pumps that work will S10 gas masks or any 40mm NATO thread along with Silicone lube available in varying thicknesses.
Checkout KB3D the brainchild of KinkyBiologist on twitter. A huge range of 3D printed parts most notably the S10 gas mask attachments and modifications, you can find these by going to the Gas Mask lab on their website.
Joanne's been making the best Estim accessories and has pretty much tried it all. Her experience means new ideas are constantly being formed and available through her store.