You could try hooking up a shop vac for blowing instead of suction and
blow them from the inside out. You need to get as close to the evap as
possible with the air source and block vents and so on. Be creative on
where to hook up. Also, the leaves had to get in there so you should
check that aspect from under the hood. Expect to remove a screen vent
there and maybe you can reach far enough to help. I'm not familiar with
your vehicle, but some have a flapper door that can be accessed from
beheath, which would allow you to pull debris out there as well.