Or if you want to keep it simple and fast here is code for a php redirect page:
For plain html use:
In either case if you use the above method, you should put the pages in their own directory and disallow that folder in your htaccess file.
Be sure to replace your the fake affiliate link (in red) with your affiliate link.
Then you can name the page affiliatesite1.php or affiliatesite1.html.
This would then mean your affiliate links on your site would look like
http://www.yoursite.com/go/affiliatesite1.php or http://www.yoursite.com/go/affiliatesite1.html
You would need a single page with a unique name for each link you use.
Notice in the html example I added the no index tag.
Rick
Universal4