Google on 'Piraat clone recipe' and you will get plenty hits...
Though I have not brewed it, this recipe looks close to what I think Piraat tastes like. I assume it is for 5 gallons.

14 lbs. Belgian Pils
.25 lbs. Acidulated Malt
1 lbs. Midwest Wheat Malt
1.5 lbs. Honey
.75 lbs. Corn Flaked
.5 oz. Cascade (Whole, 5.50 %AA) boiled 0 min.
2 oz. Liberty (Whole, 4.1 %AA) boiled 90 min.
1 oz. Cascade (Whole, 5.50 %AA) boiled 15 min.
1/2 ounces Corriander, ground
1 ounces Sweet Orange zest, fresh
Yeast : Wyeast 3787 Trappist High Gravity info
http://www.babblebelt.com/newboard/thread.html?tid=1108752780&th=1152145596&pg=&tpg=1?