I had a phone call from Boblor tonight. They are on the road and don't have access to the interweb. Today they came across a 'Caralux' caravan in the Murchison/Violet Town (Victoria) area. The van has been offered free to anyone who will give it a good home. Boblor has photos, but of course can't post or email them at this point...
Here are the details:
Approximately 13 ft long
Estimated by Boblor to be mid-50's
Embossed aluminium clad bondwood - Boblor believes the cladding is original factory because of the way it has been done
Very large aluminium windows all around with good condition rubber sealing between walls and windows
Gas stove and head high cupboards with sliding doors all around the van...
For some further information about Caralux caravans, see the Our Touring Past website here which indicates that the firm was building caravans at least as early as 1947.
The adverts tell us that at that point Caralux was producing 14 ft vans which were 6 ft 6 in wide, using Henderson chassis, coachwood interiors (indicating varnished furniture perhaps?), Seaply cladding, and 15 in wheels.
We are probably safe to assume that production had started well ahead of advertisements being placed in the newspaper, so that suggests that Caralux was probably in business prior to July 1946 - perhaps 1945 or early 1946 at least (and certainly earlier than 1947, contrary to the post above). Of course they may also have been in production prior to WW II, but at this point we don't know whether that was the case or not.
The following article appeared in the Liverpool newspaper The Leader on Thursday, 6 February 1947 (page 1), and records that local caravan manufacturers Caralux, and Seal and Down, both participated in a procession as part of a 'Back to Liverpool' event: