Try WY3522, Belgian Ardennes. It's not as estery as a typical abbey/trappist yeast.
Or, you could fall back to WY1214 - Chimay yeast. Cana-Belg yeast is apparently a descendant of a sample taken from Chimay 40-odd years ago. I imagine they've diverged a lot since then, however.
Also, Unibroue apparently uses different yeasts for fermentation and bottle conditioning. I suspect that WY3864 is the fermentation strain, so bottle culturing may not be optimal.
Also, Unibroue apparently uses different yeasts for fermentation and bottle conditioning. I suspect that WY3864 is the fermentation strain, so bottle culturing may not be optimal.