If you have read my blog for any amount of time, you probably know that I like using GW's Praetorians and Mordians for special weapons units in Victorian Science Fiction.
I found a site that has a real Praetorian addict's work. He goes by Colonel Gravis, and (God help him), he's a 40K tournament player out of the UK. He does some really awesome conversion work though, and even takes commissions apparently. I think it is definetly worth a look: