Forgotten Song Identification Please

A work colleague is at risk of losing face to her brother unless a half remembered song can be identified; so I wondered if the wonderful people at The Dope might be able to help!

It’s an indie type song from pre-1985 (she remembers hearing it on a trip to Iceland in August 1985 which dates it from that period). Possibly on the Factory Records label, although a search of this doesn’t pull up any identifiable titles.

The main thing she remembers is that it features a sample from the Billy Wilder film Stalag 17, in particular these lines:

(Sefton) The Germans know where Dunbar is.
(Hoffy) How do they know?
(Sefton) You told them, Hoffy.

I know it’s not much to go on but it might mean something to someone, many thanks!

Maybe this site can help narrow it down?

Samples of Stalag 17 by Ansel Collins | WhoSampled

That search shows songs that sampled the song Stalag 17. Searching that site for samples of the movie is no help (it returns a single result for a 4-second between-song track on a punk rock album from 1995).

OP, your description doesn’t ring any bells. Sorry.