I recently had a minor op from a doctor who also works with the English national rugby squad, so I quizzed him about cauliflower ears and he mentioned something I've never heard/read on grappling forums. He said a brand of blister plasters called "Compeed" from Johnson & Johnson were great for cauli if you can't get it drained straight away. They draw out the fluid from inside the ear into the plaster and are effective to the point that no clamping is needed to prevent it from refilling. He said that they can also be used to quickly remove/reduce the swelling from black eyes.
Just cut the plaster to size so it can fit flush on the swollen part of the ear, it will stay attached for "several days" and fall off on its own. I've yet to test it personally on any fresh cauli since I only heard this for the first time last weekend but I picked up some plasters to check them out. They are almost transparent pads about 1mm thick with absorbent gel/material inside and a pretty strong adhesive for attaching to the skin. At first I thought the gel might leak if I cut it to fit my ear but the cut edge and inside was completely dry. The adhesive seemed great and the plaster wasn't really noticeable on the inside of my ear, I feel I could roll with it on and not have any issues. In fact the doc said that a couple of the England players put them on before games in case they get ear trauma.
I wonder if anyone else has heard of this solution, I can't attest for any of the claims made here since I've yet to have my ears smashed after picking the plasters up. Maybe some frequent cauli sufferers can try it out and report back. Compeed is available in Europe and Aus/NZ but I'm not sure if it is widely sold in the US and I'm unsure if there are any equivalent products. Anyway, I hope this is useful being my first ever post (omg!).