yeah they make some beautiful scopes...the Zenithstar is similar only in red and white
It might be worth contacting Andrews Communications in Sydney as they sell a bunch of WO stuff, no doubt they could get one. Alternatively contact WO direct, as they would ship from the factory and you'd be less subject to US$ affected exchange rates.
I've no idea if you could use a Barlow though, I've never tried, but this is certainly an interesting point, but underscores why it's important to consider your choice and the focal length carefully. What I would do is calculate the FOV of your scopes of interest, and then use Sky Safari or Stellarium or similar to simulate how you would frame objects of interest.