Hi Mattias,
We have the Birotron loop masters here but they are a little sad. There are some unique sounds including a string section, choir, church organ, flute and brass. I think I've already edited up the choir as we may have all of the original takes unlooped. They are recorded on 1" Ampex which likes to clog the heads instantly but there are also some 1/4" loop masters. We could try conjuring up a set if you were interested.
Best,
Martin