Not the version I would have picked but a starting point.
http://www.ebay.co.uk/itm/Italeri-Plastic-Model-Kit-1-72-UH-19A-Rescue-Chickasaw-1215L-/300948814571
Italeri Whirlwinds from Korea
£13.66 free post and packing
A very hard to get hold of kit
Rodders