Don’t know if this has already been mentioned yet, but there is one of this currently on ebay. Not mine, and I don’t have the URL handy, but do a search using “Low Whistle” and it should come up.
Still there, no bidders. Asking for $150 as first bid:
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2552017335&category=624