Track redirected traffic with Google Analytics

I distribute marketing material which directs people to a website (let’s say mydomain.com). The domain simply uses .htaccess to redirect the visitor to an affiliate link (http://www.clickbank.com?id=1234) and ultimately to the destination (retailstore.com). Occasionally some hits may come from a referring website but most are direct traffic from users entering my domain name into their browser. I like this setup because it’s fast and relatively seamless… there’s no page saying "please wait while we redirect you…', and my distributed literature has a professional looking domain name instead of a long affailiate link.

The problem that I have is that it does not give me an option to track referrers, hit counts, etc. because it redirects before I have an opportunity to execute any code, ie javascript for GA tracking or even any php-based tracking.

Any ideas for a better way to deal with this?