You can do what I do in the summer.
Screw-clamp 3" corrugated metal duct from ACE Hardware onto your stock air cleaner and route it under the front bumper with baling wire to hold it in place.
It's redneck but it works and I don't want to make any permanent modifications to my Jeep or its air cleaner. I have an early air cleaner with the round snorkel that was never designed to have a plastic duct on it like the later air cleaners did.
It seriously works. Hot summer days with the A/C on used to cause some rough idle/vapor lock problems when I didn't have "redneck duct". No such problems with "redneck duct". I figured out to put a mesh screen over the end of the duct after I filled my air cleaner with locust parts. I take the duct off in winter.
Yes, babywag, I hear you, "TBI don't have that problem". I know that. I'd rather just clamp a duct onto my air cleaner though and be done with it.