I did see something that might help you Shaun and it's cheap.
It was a plastic jug like a milk carton, only round, where they cut the bottom out and a quarter section of the wall to shoot thru. Set it over the product. It controls the light by diffusing it so you won't end up with that flash hot spot. I would recommend a tripod and no flash if possible too.
edit: Check this thread out as this is where I saw it....
https://www.talkemount.com/threads/trout-lilies.17922/