It looks like Teke is next on the list in #4 position. Is that member able to receive them to test? I didn't think my turn would come up as quick and ended up selling the MS1i and SR-125 headphones. I still do have my pink Grado SR-60, if need be. I'm just debating whether to liberate that driver, though.
Also, it was mentioned earlier that the Koss KSC75 drivers might be sufficient for testing. The driver is the correct dimension in order to fit the cups, but from what I've read, the driver doesn't do as well in open Grado cups. The driver itself does work in open-air / vented mode in the clip on Koss headphones, but with the Grado cups, it appears to be a different story.
just my 2 cents but I think an SR60 donor would be ideal. go for it! those drivers deserve better than plastic