Weld a threaded rod to the bottom center of your boil kettle, then you can kind of cider-press the hops at flame out.
That's actually not a half-bad idea. Or at the very least, you could drop a false bottom on top of your hops and press the whole thing down. For the brew in question, I had to dump the wort/hop mass in my BIAB bag and wring it out. My "whirlpool" consisted of me pressing down on the hops with a slotted spoon to squeeze a bit of juice out in spots - like wringing out a massive sponge on top of itself.
So, if anyone was wondering what's the most amount of hops you can put in a beer, it's about 1 lb/gallon for whole hops. The verdict is still out on pellets...