I have 1 from opticsplanet.com it looks almost just like the harris bi-pod my dad has but mine was only $35. Its a leapers utg bi-pod. They make good products and they're easy on the wallet. I haven't had any problems from mine and it works great.
Leapers UTG Tactical OP Bipod w/ Picatinny and Swivel Stud Mount FREE S&H TL-BP78, TL-BP88. Leapers UTG Bipods, Leapers UTG Shooting Accessories, Leapers Bipods, Leapers Shooting Accessories. copy and paste and it will take you right to it. Free shipping on orders over $30