Fom the limited view in your render, it looks like it is 'very similar' to the model offered by 'De Espona' at this site - http://www.the3dstudio.com
A search for "forklift 3d" using the Google image engine should find a few more possible candidates, but I think that this is the model info you were looking for. Sadly the De Espona catalogue of models has been very heavily abused on torrent sites and I have seen quite alot of them turn up here and other artist oriented sites.