Autumn Seasonal Beer Elysian Great Pumpkin Imperial Ale

Does anyone have a clone recipe for this beer?

Wouldn't call it a clone, but a great Imperial Pumpkin:
Mash Ingredients Amt Name Type # %/IBU
17 lbs Pale Malt (2 Row) US (2.0 SRM) Grain 1 89.5 %
2 lbs Caramel/Crystal Malt - 50L (50.0 SRM) Grain 2 10.5 %
7.00 lb Pumpkin (Mash 60.0 mins) Other 3 -

Mash Steps Name Description Step Temperature Step Time
Mash In Add 23.75 qt of water at 163.7 F 152.0 F 60 min
Mash Out Heat to 168.0 F over 2 min 168.0 F 10 min
◯ Fly sparge with 2.81 gal water at 168.0 F

◯ Add water to achieve boil volume of 6.47 gal
◯ Estimated pre-boil gravity is 1.084 SG

Boil Ingredients Amt Name Type # %/IBU
1.00 oz Magnum [14.00 %] - Boil 60.0 min Hop 4 35.5 IBUs
0.50 oz Sterling [7.50 %] - Boil 10.0 min Hop 5 3.4 IBUs
0.50 oz Ginger Root (Boil 5.0 mins) Herb 6 -
0.50 oz Allspice (Boil 5.0 mins) Spice 7 -
0.50 oz Cinnamon Stick (Boil 5.0 mins) Spice 8 -
0.50 oz Nutmeg (Boil 5.0 mins) Spice 9 -
0.30 oz Cloves (Boil 5.0 mins) Spice 10 -
◯ Estimated Post Boil Vol: 5.72 gal and Est Post Boil Gravity: 1.099 SG

Fermented with London Ale, finished with Champagne.

How does this recipe compare to the great pumpkin? I really like that beer.