Try searching. Here’s an outside link for ya: http://www.lifeclever.com/13-lucky-alternatives-to-helvetica/

I don’t know how far you want to stray from Helvetica. You might want to try Univers 45 Light, Akzidenz Grotesk Light, Avenir 35 Light, Avant Garde, Franklin Gothic Book. Some of these are not so close to Helvetica, but looking at your site, I think any of these choices could work on some level.

I’ve always liked CP Company, but no italics. Not sure if that’s an issue.

There are lots out there! Check out a list from HOW:

Univers (http://en.wikipedia.org/wiki/Univers)
FF Schulbuch (http://www.fontshop.com/fonts/downloads/fontfont/ff_schulbuch/)
Neuzeit s (http://en.wikipedia.org/wiki/Neuzeit_S)
Heldlistry (http://www.urbanfonts.com/fonts/Heldustry.htm)
Akkurat (http://lineto.com/The+Fonts/Font+Categories/Text+Fonts/Akkurat/)
Paralugent (http://www.veer.com/products/typedetail.aspx?image=DET0000198)
Galaxie Polaris (http://vllg.com/Village/GalaxiePolaris/mudTyper+Weights/)
Basic Commercial (http://www.linotype.com/2387/basiccommercial.html)
FF Bau (http://new.myfonts.com/fonts/fontfont/bau/)
Monotype Grotesque (http://new.myfonts.com/fonts/agfa/grotesque-mt/)

best regards,
daniel