BuddyPress custom profile questions - can I add "URL" as a question type

In setting up a BuddyPress network, I was surprised to see that when I started adding custom profile questions, I was unable to add a URL as a question type. I am setting up a business network, and want members to be able to link to their business website, LinkedIn profile, twitter page, etc.

Is there a plugin that adds new profile question types, or a (very) simple coding option?

Does anyone else think it strange that this option doesn't exist?