Another reason why you're not seeing too many DIY Follow Focus projects anymore, here's another new and cheaper follow focus system listed on the market. Doesn't look pretty but the listing claims it's made of aluminum (mostly anodized black), ABS, and rubber. Comes with a quick release 15mm clamp style mount and universal lens gear.
With the quick release style clamp, It can be mounted on both left and right side of the camera, but the gear on the box is also reversible. It also has both vertical and horizontal height adjustments, overall a decent feature set retailing for only $88 dollars. Obviously it all boils down to how effective the gearbox is in the FF, but you can find more images and information via eBay (Click Here).
Cheap 15mm Quick Release Follow Focus
Keep in mind you'll still need a basic set of 15mm Rails to mount. Your basic set should include two 15mm Rods, a Camera Baseplate (to mount your camera), and a Tripod Mount (to attach the rails to your fluid head) - like this basic set (found here).
15mm Rails Camera Baseplate and Tripod Mount
A quick look around the budget Fotga Follow Focus. This was another one shared on this blog just a few weeks back which has a 'riser' design to make sure it can always hit the lens gear. Sometimes using smaller diameter lenses or tall Battery grips will render some FF's useless. This is not a reversible gear, but of course if can still be mounted either left or right. Definitely looks like quality stuff, not cheap plastic. A great option next to the other FF's on the market. I can't tell if the crank whip notch is standard (a minor issue with RJ's follow focus). A bit of lash like most FF's in this range, but not too shabby for the price. For just a bit more, there's an option for a 'quick release' version in case you're using MatteBoxes and such. [Thanks Eirik]
Fotga DSLR Follow Focus with lens Gear
A few hands have received the Budget Follow focus and it looks awesome! You can find one review here: https://cheesycam.com/budget-follow-focus-reviewed-again/
DSLR Follow Focus with Lens Gear
Remember that you'll still require a set of 15mm rods to mount, so take advantage of those Gini auctions. I'm guessing with the popularity of this new FF, even those prices might change a bit. (Luckily I ordered three kits earlier this month).
Gini DSLR Rig Stabilizer Kits