I don't have a suggestion, but it brings back an old memory.
My grandfather was a pharmacist, he was born in the 1800's, and we had a family drugstore, since torn down, taken away from us by eminent domain, sold to Macy's.
In the basement were a bunch of antique items, all have since disappeared. One of the items was a suppository machine. It consisted of a press. It had a cylinder, like a revolver pistol. It had about six chambers, each machined to the shape of a suppository. I was told that the suppository was made up from a mixture of coco-butter and other ingredients, the gob was placed in the loading area, a little metal door was closed, then a large wheel, about 8" in diameter was cranked, driving a screw press to force the material into the chambers. I'd never seen it do it's job, but at some point the door was opened and the suppositories were pushed out.
If you think about it, it would be similar to a bullet mold, for making lead, cast bullets. I'm sure with a little more time on my hands, I could build one, don't know if it would be worth the labor, you decide.
I did a search on the internet, "antique suppository machine" and came back with several hits. I don't remember it looking exactly like the images I found, but fairly close.
The hoseman1