You could rent (from big box auto parts store) or buy a chain-style "exhaust" pipe cutter. and just put your oil filter in a vise. Should make a nice clean cut.
I have something like this, but bought off eBay. I think a couple bucks more but free shipping--under $50 IIRC.
FWIW last time I used it I think I figured it out: I pop the oil filter into my bench mounted vice, then put the cutter on top and spin it around. Bit of a pain but got me the leverage required to cut the can.