Specifying a particular ad on a particular page

I recently installed the ad module on a client's site, and it seems to be working nicely, but they just gave me a list of last-minute changes for an update that's going live tomorrow morning, and one of them was that they wanted a particular ad to display on a particular page.

The layout has one banner ad spot at the top, and normally, the various ads in the "banners" group are displayed there randomly - on any given page load, people see one of the banners, but which one they see is randomly determined, as per usual for the module. But in this case, they want me to make sure that one specific ad from that group is displayed on this particular page, because it's relevant to the page's subject.

The only ways I can think of to do that are:

1. Create a new ad group containing just the one ad - but then it won't show up on any of the other pages, which use the normal banner ads group.

2. Keep the ad in the banners group, but also create a custom block that just contains the one ad as straight HTML, rather than a block generated by the ad module, and use that block instead of the normal ad block on that page - but then it wouldn't count clickthroughs.

3. Upload the ad twice, so that there are two identical ads, with one of them in the banners group and one in its own separate group. Probably the best (or least bad) solution of the three, but still not ideal as it means the statistics for that ad will be split between its two incarnations.

Is there some other way I'm not seeing, that would allow the ad to still be just one ad, so that its statistics are easily accessible in one place, but sometimes display as part of the banners group and sometimes on its own?