Hi Katie,
You can also check out our ink company named Letterpressink.com. We have quarter pound and one pound cans in rubber base.
If you use coupon code: Letterpress Love, Then you can get 10% off.
If you need five pound cans I can get you pricing. They are not listed on the site yet.
Happy Printing!
Thank you,
Pete
Old City Press & Co.
Pete@oldcitypress.com