LM3475: Models for simulation available?

Hi,

I've been asked to simulate a customer's design which uses the LM3475 Hysteretic SMPS.  I would like to determine, among other things: power supply efficiency, output voltage ripple, and estimate possible emissions on the input to assess whether filtration is needed.

I looked on TI Webench but there is no listing for LM3475 (although a similar IC is shown, LM3485, I doubt this would give representative results). 

I looked on the LM3475 web page and there's no mention of models available.  

I did a Google search for anything else I could use for the LM3475 but other than the datasheet I cannot find anything. 

Please advise if there are any simulation tools or models for this IC that I can use to simulate its behaviour.  If not, let me know how best I can get an answer to the above parameters.

Thanks!