Thanks SpanishCastleAle! Nice to know the exact malts. From what I hear they use a different base malt in the Fat Tire recipe than all others. Maybe that is it.
Now I didn't get the recipe posted last night but did manage to sit and drink one. Priorities you know.

Hard to tell from the picture but I think the color is dead on so maybe I would adjust anything. Hmm, Just seems like it needs more of that cherry taste. Been so long since I had the original that maybe I'm off. They did say they would release it as part of the Lips of Faith bottle release. Hope that happens soon as I would love to do a side by side.
Abbey Grand Cru recipe.
Ingredients
Amount Item Type % or IBU
13.00 lb Pale Malt (2 Row) Bel (3.0 SRM) Grain 74.50 %
2.50 lb Munich Malt (9.0 SRM) Grain 14.33 %
0.50 lb Caramunich Malt (56.0 SRM) Grain 2.87 %
0.25 lb Caramel/Crystal Malt - 80L (80.0 SRM) Grain 1.43 %
0.10 lb Chocolate Malt (350.0 SRM) Grain 0.57 %
0.10 lb Special B Malt (180.0 SRM) Grain 0.57 %
0.40 oz Magnum [14.00 %] (60 min) Hops 14.9 IBU
0.50 oz Williamette [5.00 %] (20 min) Hops 4.0 IBU
0.50 oz Liberty [4.30 %] (20 min) Hops 3.5 IBU
1.00 lb Candi Sugar, Clear (0.5 SRM) Sugar 5.73 %
1 Pkgs Trappist Ale (White Labs #WLP500) [Starter 35 ml] Yeast-Ale
Looks like I did do a double infusion mash.
Step Time Name Description Step Temp
30 min Protein Rest Add 14.81 qt of water at 132.1 F 122.0 F
30 min Saccrification Add 13.16 qt of water at 197.3 F 154.0 F
10 min Mash Out Add 11.52 qt of water at 205.6 F 168.0 F