John,
Unfortunately, most companies these days that do business via the web request some of your personal information before they will provide you details for a quote.

Typically the best way to do this at least semi-anonymous is to work with a reputable life insurance broker who has a relationship with multiple companies, and can provide you a comprehensive comparison of options without necessarily submitting any of your personal details to the companies directly. A good insurance expert can make the comparison process significantly easier!

I hope that helps a little!