Stock bars are 1 inch in diameter so any 1 inch bars will work with the stock risers. Stock cables and wires should work fine too. Also, a lot of bars will have the option of a "dimple" in the bars to give clearance for the cables and wires. This is not necessary with the stock controls.
A couple points to note:
1) the throttle housing has a small pin protruding from it and the stock bars have a corresponding hole it fits in. This is to keep the housing from twisting on the bars. There's a good chance your new bars won't have a hole, so you have two choices; drill the bars, [which is a pain], or grind off the pin. Lots of guys here grind it off, it's what I did. Just be sure to tighten the housing screws well and you'll be fine.
2) it's easier to pull the clutch and throttle housings off the ends of the bars *after* you remove the bars from the riser clamps. It gives you more slack to work with. Same thing with installing the new bars. Just be aware, when you loosen the riser clamps, the bars will spin and drop down on your tank if you're not holding them.
3) the stock bars have knurling on them to prevent the bars from slipping up or down. For legal purposes, some manufactures will tell you their bars are not approved for use with a Roadie. It's because the spacing of knurling is off by a few centimeters and it may not line up completely with the Roadie riser clamps. But again, if you snug them down good an tight, it's no problem. This is significant because, If you don't worry about the "Roadie approved" only bars, you'll have a lot more options with all the Harley bars out there to choose from.
Here's a link to the stock bar dimensions for comparison: http://www.sideroadcycles.com/ImportedMotorcycles/ImportHandlebars/StockBarsOne.html
4) don't forget the middle adjuster on the clutch cable cover where it runs up along the frame. Use it to give yourself as much slack as possible when removing and installing the clutch lever housing as well as adjusting the play and tension on the clutch cable when you're done. It also helps to remove the clutch cable end from the actuator arm on the side of the engine.
Best of luck.