So I just went there and as you described I was able to find the three stores:
1) The one in the Tital Complex sells a "half squat rack" and also other Gym stuff like bench press and treadmill (Not much variety one kind of each)
2) The second one behind the Tilal Complex is called "Sport Fitness" and it is basically a distributor for high end commercial GYM equipment, so expect the price to be in the range of 500-1500KD.You can find all your needs for home gym there. They have some of the equipment in stock here in Kuwait and others they can order it from them and have it shipped here here ( which he says takes 60-90 days).
I found the Squat rack there "also called power rack" cost total 560KD and will take 2 to 3 months to reach Kuwait
3) Not sure if that is what you meant but I found a store called "GYM Doctor" just nearby ( let Sport Fitness on your right and go straight it will be the second building on left, the store is visible as you drive in your car so it shouldn't be hard to find it )
Same story here a high end gym equipment distributor that has some in stock and others can be ordered. GYM Doctor also sells the squat rack that costs 400KD and 2-3 months for shipment ( Interestingly, he mentioned that he had sold 5 squat racks in stock in Kuwait, last sold in Ramadan )
Personally I'm going to order this brand using Mrbabu, which has a good review and is basically what I need with less cost ( although the shipping costs goes over the price of the rack itself.. oh well ! )
Hopefully this helps someone who is searching for squat racks later on, Good luck