I use a cheap pair of walmart hiking sticks that I fasioned into shooting sticks. I cut the plastic handles off and replaced them with foam. Tied the sticks together just below the handle. They have flips locks for fast height adjustments. Hit with some paint. They aren't bad for the $20 investment.
I'm a really big fan of the shooting tripods made by Precision Rifle Solutions. I have their SSP-1 rifle-rest head with a large tripod and I've been very happy with it. Works great for coyote hunting or taking standing shots while out hunting ground squirrels. Rather light and portable as well. Best $150 I've spent in a long time.
Not sure if you are looking for a high speed version, or a mod. Here is my $9 solution using a versapod. The versapod legs are the same diameter as a replacement tent pole. Mod is not permanent and the bipod can be slipped off and hand carried in the field.
As already said, what are you shooting, where are you shooting,and what target size?
I am a fan of being able to shoot how ever the situation dictates. From unsupported, hasty sling, supported on terrain features, all the way to a tripod. Not saying that I have but if you master the position you can hold pretty good.
5 shots @ 100yds off tripod (I choaked on the last round):