Just tried one.
I'd start with a tripel, add a couple of lbs or so of wheat malt, but probably not over about 4 lbs max (if you're looking to clone it, start low and work up), and culture the yeast from the bottle as that's where the majority of the character is coming from (a little banana, some pepper notes, some fruity esters). The alcohol was noticeable and I think the plain sugar is upwards of a golden strong type of beer so far as content, or else they don't let it lager for a period to smooth it out. I really think this beer would benefit to a period of time during fermentation where it is fermented cooler then warmed up slightly to ensure it is "finished," then lagered cold.
Just off the top of my head...
For 5.5 gallons:
13 lb Pils Malt
2 lb Wheat Malt
3+ lb sugar (Cane sugar should be fine)
You can add the sugar after the fermentation kicks off or at the end of the boil. Either would probably work.
Hops are subdued in flavor so I'd probably just use Northern Brewer for bittering and then a Mt. Hood, Styrian Goldings, or something similar at 15 mins (it has an earthy note I can't really pin down that may be from the hops or from the yeast so I'd have to have more of the beer to really determine what I was tasting). I wouldn't go much over 35 IBU, if that, with the vast majority of it coming from the bittering addition. The bitterness is noticeable.
If you can't get the yeast to culture from the bottle, WLP500 or similar would work but I don't think this is the yeast that is used. You may want to do a little research as to what each Belgian strain brings to the party and go from there. The yeast is quite important to the overall beer; flavor and aroma are very much from the yeast in this beer.
Don't know if that helps or is all that close but, from what I just tasted, it should be a good start.
Good luck and report back on what you find.