I'm wondering if anyone here has an original Integer BASIC cassette and might be willing to upload an image of it to the wiki commons? There's a serious lack of imagery in the article in en.wiki, and this seems like a reasonable way to spruce it up.
Oops. Rereading the questions body makes me think that it's not asking about a copy of the BASIC, as the title implies, but for a photographic image of the cassette it was distributed on.
This Youtube-video of Core Cohen shows what might be a pre-production cassette.
Go an ask, I can't imagine him denying usage for the Wiki.