Welcome to Rebreather World.
You'll find a lot of folks here who've converted their Dollies. There are some great links in the links section to those who have websites of their project.
There's also tons of pics and info in numerous threads detailing various aspects of conversion.
There's also a few who've built their own leccies as well.
You can't have a really custom Dolly without multiple O2 cells, digital readouts, and a hud
Post some pics of your project when you can.
Darlene