Try this link to Horizon Hobbies, has a couple of .wav files of sampled Merlins.
Pure joy
http://horizon.hobbyshopnow.com/articles/1136.asp?pg=2
I have them downloaded, and play them every now and then.
Oooh, just played again. Gone all guey. Sorry.
No, no way you can get a model to sound like that.