Don't know of any specifically.
However, you can go to your favorite hardware store and get a couple feet of copper tubing or aluminum tubing. It probably won't be the same outside diameter as the plastic hopper, but it'll be close. 4 screws will hold it in place and also you can make a baffle for the inside from sheet copper or aluminum. Then, fill it with a pound of powder. Cut it off an inch or two above where the top of the powder came to. Since the low powder warning lid is desirable, get a couple feet of steel rod, thread one end and put on a copper disc cut from some sheet copper, (nut-washer-disc-washer-jam nut), put it in the hole from the Dillon rod assy., measure it so it will trigger the alarm, and then do the thread, nut-a larger fender washer that would push down the warning mechanism trigger- then a couple extra washers to add the weight on top and did the washer-jamnut thing again. Cut another thick disc the size of the inside diameter of the tube of something like cardboard (I heard leather works) and glue it to the bottom of the battery/buzzer assy. housing so it won't bounce around on top of the now smaller diameter hopper - but it will STILL go back to pure Dillon equipment in about 1 minute.
Works like a champ: BP OR smokey-less.
WARNING !!! You do this at your own risk and ya better never mention it to Dillon, 'cause if ya have a problem, they say that "BP will VOID their warranty."