Originally Posted by 70sSanO

If it is a 2004 with Ultegra, you’ll 9 speed shifters.

The most cost effective are Microshift R9. It is compatible with Shimano. I imagine it is a double crank.

So you basically need the bars, maybe a stem, Microshift shifters, a Jagwire cable kit, and handlebar tape… plus whatever unrelated parts you need to replace on the bike.

John