I've driven a Subaru since 1997 to deliver mail in any road conditions you care to mention. No matter how well ploughed the road is, the shoulders are still slippery, and that's where I drive. They are unstoppable.
Have done a great deal of research attempting to find a replacement for my 91 and the niche market exists for RHD here as well as in the US. Found several sites with postal carrier groups all of whom bemoan Subaru's loss of the postal contract to Jeep in 99. Jeep is producing a Sport (way too small) with cup holders between the seats (we use that space for our bins of mail - duh) and a soft top (!) supposedly to serve this market. They must not have done any research at all.
The older Subarus are wearing out and carriers are getting desperate for replacements. I would buy a new RHD Legacy wagon in a heartbeat if they would see fit to produce one for the North American market again. Hope you have lots of pull with the ad department.