We used to sell pumps but stopped because we just couldn't find a pump that could handle the viscosity of our resin...it's just too thick.
We ended up getting Resin squeeze bottles and FIFO bottles which our customers have found to be very useful. They both have different pouring spouts, so it comes down to personal preference on which they like best.
Here are the links to them:
https://counterculturediy.com/product/artist-resin/original/fifo-bottle/
https://counterculturediy.com/product/artist-resin/original/resin-squeeze-bottles/
We are here if you have further questions; support@counterculturediy.com.