I had an LB30 and loved it. I ran it with a 4 ohm LB212 and it was just perfect.
There's an LB212 on eBay for a good price [url="http://www.ebay.co.uk/itm/Ashdown-LB-Cab-2-x12-/271259087242?pt=UK_MusicalInstr_Amplifiers_RL&hash=item3f284d318a"]here[/url], and a silly expensive one [url="http://www.ebay.co.uk/itm/ASHDOWN-LB212-100-WATT-2x-12-CAB-CABINET-/321171102640?pt=UK_MusicalInstr_Amplifiers_RL&hash=item4ac74a1bb0"]here[/url].
The alternative is a combination of the VS112, 212 or 115 cabs, but they are Chinese made, and much heavier than the UK made LB cabs.