Protege5 engine blew. What engines can be dropped in as a replacement?
 

Title pretty much says it all, and I joined to make this post. I put a 2003 Protege 5 about 5 months ago with 109k on it. The car now has 121k miles on it (I commute far). I was driving home from work earlier this week when the car began to stutter and then I got very vicious rod knock. Oil level was fine at the time. I had a 60k/timing belt done about a month ago. My mechanic said he had to replace a gasket around the spark plugs, as it was blown and letting oil leak into the cylinders. I had noticed that the car was burning a lot of oil before the 60k. It seemed to have not burned any oil 1 week after, but I hadn't checked the level since then.

At this point, I'm going to put in a used engine of some sort. Are there any other engines that will drop right in? My first and only criteria is reliability. I ask about other engines only so that I can get an engine quickly and at a good price.

Thanks!