It sounds like you want a single-section pole. The obvious answer is go to the local hardware store and pick up some sort of hoe or rake handle (my first was called a "utility" handle), drill a hole at top and run a cord through it for a strap. A bit heavy and bulky, but it won't break - or, if it does, the cause will be so traumatic that a collapsed pole will be the least of your problems.

A lighter alternative is the Tracks Lite Staff: http://www.trackspoles.com/walking_hiking.asp?Action=LiteStaff

It's a nice, sturdy staff. I used this for a while, too (this was way back when collapsible poles were still getting started.) It never gave me any problems - although, if you happen to fall in such a way that you pin it against a good-sized rock and wrack it just right, it will bend. (Don't ask how I know that. The answer would involve a moss-covered rock under half an inch of water, and a bit too much trust in my boot tread.)