Abt 12
Brouwerij St. Bernardus
Belgian Quad
10% ABV
Monk's Brew
Mikkeller
10% ABV
Trappistes Rochefort 10
Abbaye Notre-Dame de Saint-Rémy
11.3% ABV
Monk's Elixir
Mikkeller
10% ABV
Stochasticity Project: Quadrotriticale
Stone Brewing
9.3% ABV
Abstrakt AB:16
BrewDog
10.6% ABV
Partizan Brewing
Belgian Quad
There's another bunch that come under Belgian Strong Dark Ale that would also probably suit your tastes but I'd have to find extract tasting notes for them all and ICBF.
These are the Belgian quads I've tried from untapped:
Sint Amatus - Oostvleteren 12 (2013)
De Struise Brouwers
11% ABV
Brouwerij De Prael
Belgian Quad
11.5% ABV
Préaris Quadrocinno (2015)
Vliegende Paard Brouwers
10% ABV
Grimbergen Optimo Bruno
Brouwerij Alken-Maes
10% ABV
Malheur 12°
Brouwerij Malheur
12% ABV
Keyte Oosténdse Dobbel-Tripel
Brouwerij Strubbe
9.2% ABV
Préaris Quadrupel
Vliegende Paard Brouwers
10% ABV
Kasteel Donker
Brouwerij Van Honsebrouck
11% ABV
Trappist Westvleteren 12
Brouwerij De Sint-Sixtusabdij van Westvleteren
10.2% ABV
Quintaceratops
Brooklyn Brewery
10.9% ABV
Gulden Draak 9000 Quadruple
Brouwerij Van Steenberge
10.7% ABV
Komes Poczwórny Bursztynowy
Browar Fortuna
10% ABV
Three Philosophers
Brewery Ommegang
9.7% ABV
Abt 12
Brouwerij St. Bernardus
Belgian Quad
10% ABV
Monk's Brew
Mikkeller
10% ABV
Trappistes Rochefort 10
Abbaye Notre-Dame de Saint-Rémy
11.3% ABV
Monk's Elixir
Mikkeller
10% ABV
Stochasticity Project: Quadrotriticale
Stone Brewing
9.3% ABV
Abstrakt AB:16
BrewDog
10.6% ABV
Partizan Brewing
Belgian Quad
There's another bunch that come under Belgian Strong Dark Ale that would also probably suit your tastes but I'd have to find extract tasting notes for them all and ICBF.