Customising RSS feed fields via views?

I have a site up and running that aggregates loads of RSS feeds using the FeedAPI stack to create nodes. Unfortunately, when you look at the RSS feed for the recently added nodes created by the views module the 'author' always shows up as the Drupal user who added that feed - not the source in the original RSS feed - and the title of the node is just the aggregated title of the blog post.

So you get this:

After two years... the lift is back!
Date:Yesterday 13:30
Author:JimKillock

Where in fact we want this:

After two years... the lift is back!
Date:Yesterday 13:30
Author: Ben Jones

Or in the style of PlanetPlanet:

Ben Jones: After two years... the lift is back!
Date:Yesterday 13:30
Author: Green Home

With views I can create templates to change things around a bit, but it isn't much help for RSS feeds. All you get is this for each item/row in the feed:

  <item>
    <title><?php print $title; ?></title>
    <link><?php print $link; ?></link>
    <description><?php print $description; ?></description>
    <?php print $item_elements; ?>
  </item>

So I can't easily look up the FeedAPI data to get the actual author name, or change the item elements without getting quite deep into the functionality of views, or with some messy SQL.

I've tried searching through the modules and forum posts but got nowhere. Can anyone help me out? Is it possible to customise what is shown in the RSS fields further?