I'm gonna be in the same boat, except in my case the chain has wore a hole through the timing cover. There is a coolant pipe in the cover, and all of the coolant ended up in the bottom end (I bought it this way!). So, needless to say, it will be getting a total rebuild. Anyways, back to the question. Look on E-bay, and you will find complete timing kits that have upgraded metal guides just for this problem. I think they are around $50 US which is pretty cheap (the factory plastic shit is $108.74), so ya that's the way to go. Or get a 20r timing guide, but you have to cut it down to fit behind the 22RE cover.
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Speed kills. Live forever. Drive a Samurai