I know that the guys over at Formutech came out with a product called Flexible a few months ago .... I think it was even logged a few times on this site as well. However from what I recall it was a mix of already well documented joint support supps .... Glucosamine, MSM, Chondroiten, Cissus, Turmeric, etc....
Personally I have had good results (even while on an Epi cycle) with a mix of high quality fish oil and Turmeric. Now I am also a big Curry fan so much of my turmeric came in that form and I supplemented with turmeric caps as needed....
Often times the importance of a balance of all the major vitamins and nutrients is overlooked as a possible solution to joint issues .... remember that these things work synergisticly in our bodies. A deficit of one or two of the essential nutrients or vitamins can contribute to a host of health issues .... joint problems being one of them. So ... IMO it is best to make sure the basics are covered before you go looking for another cure .... if you are not already doing so I would highly recommend a daily multivitamin that is formulated for the active/bodybuilding lifestyle ..... ACTIVE MULTI by FINAFLEX would cover all your bases .... and it has a joint support complex in it as well

Check it out ....
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Supplement Facts
Serving Size: 4 Capsules
Servings per Container: 60
Amount Per Serving % Daily Value
Vitamin A 10000 IU 200%
Vitamin C (Ascorbic Acid) 300 mg 500%
Vitamin D 333 IU 83%
Vitamin E 200 IU 667%
Vitamin B1 (Thiamine) 50 mg 3333%
Vitamin B2 (Riboflavin) 50 mcg 3125%
Vitamin B6 (Pyridoxine Hydrochloride) 50 mg 2500%
Vitamin B12 (Cyanocobalamin) 50 mcg 833%
Pantothenic Acid (Calcium Pantothenate) 50 mg 500%
Niacin (Niacinamide) 25 mg 125%
Folic Acid (Folate) 50 mcg 13%
Calcium (From Calcium Carbonate) 250 mg 25%
Magnesium (Magnesium Oxide) 150 mg 38%
Iodine (As Kelp) 50 mcg 33%
Zinc (As Zinc Citrate) 10 mg 67%
Potassium (Potassium Chloride) 50 mg 1%
Copper (As Copper Gluconate) 50 mcg 3%
Chromium (As Chromium GTF) 50 mcg 42%
Essential Amino Acid Matrix 552 mg *
L-Leucine, L-Lysine, L-Valine, L-Phenylalanine, L-Isoleucine, L-Methionine, L-Threonine, L-Histidine, L-Tryptophan
Super Antioxidant Matrix 60 mg *
Grape Seed Extract, pTeroPure™ (pterostibene)
Mental Focus Matrix
Flax Seed, alpha lipoic Acid (ALA), Ginko Bilboa
Liver Detoxification Matrix 135 mg *
N-acetyl-L-cysteine (NAC), Milk Thistle (80% Silymarin), Schizandra Berry)
Joint Support Matrix 275 mg *
Glucosamine, Chondroitin, cissus Quadrangularis Extract, methylsulfonylmethane (MSM)
Digestive Health Matrix 110 mg *
Pancreatine Enzyme, Papaya Enzyme
Heart Support Matrix 60 mg *
Garlic Extract, Hawthorne Berry, CoQ10
*Daily value not established.
Other Ingredients: Maltodextrin, Gelatin, Silica, Magnesium Stearate, Titanium Dioxide.