Make a trip to advance, auto zone, orielly, napa, - whatever - and look for crankcase breather elements. Years back they were all available. Now - we fabricate somehting if the old one becomes saturated. I have used a fish aquarium filter pad (cut up to make many) , hvac home furnace filter, a scrub-daddy guy, etc. There are also threads around here about making a ‘catch can’ and putting it down low in the frame.
Helpful hint - the forum search engine sux. I use ‘google site:jeepkj.com catch can’. And go at it that way.