You can get Swatt clip ons. Not cheaper than OEM clip ons, or the Suburban Machinery bars, but they will be more adjustable (you can slide them up and down the fork tubes to your liking). The come up to 3.5" rise. As far as I can see in pictures, only the 2.5" and the 3.5" are built in this way, to allow use of spacers. I think I saw a pic of the 1" rise ones, and they're 2 pieces (bar and clamp) vs 3 (fork clamp, bar clamp, and bar).
Here are my 2.5" rise Swatts:
This picture shows how the spacer lets them clear the top triple fork clamp bolt:
It's a lot more of a project than just SM bars, though. You'll need another way to mount the headlight (even with stock OEM clip ons), that probably makes the SM bars the most cost effective way to get the clip on feel.
New headlight brackets:
Then there's the brake reservoir hitting the bar clamp requiring the use of more spacers in between the bar and the brake reservoir / handle clamp:
Oh yeah, I don't know about the 03, but my 08 naked has a different fork offset than an 08 S, so if yours is the same, and you want to go the route of stock clip ons, you'll also need the S top and bottom triple:
Yeah, the SM bars would have been cake compared to all this trouble. But you know what they say about hindsight...
tk