I have TARAZON forward controls on my C50. This or re-branded forward controls were recommended by somebody here on the forum years ago (found in search). I like the look and it works well. It bolts-on to existing holes where platforms are attached. They are well build, hardware is very decent. One small thing I might be looking to upgrade in the future are the rubber foot supports as they are quite minimal and depending on the boots you are wearing, might be a bit slippery (not dangerous) in rain. Quoting my review on Amazon: "I bought a black anodized. I bought mine from eBay. Installation instructions are lacking, but if you wrench on your own bike, you will be able to do it. Fit and finish is superb, there is no play. There are bronze bushings in gear and break actuators, stainless steel hardware is good quality. Overall, I'm very satisfied, especially considering for the money I've paid. I'm 6'3", riding a Suzuki C50 2008 and needed a few extra inches - this did it."
Installation instructions are lacking: one pager showing exploded diagram of the forward controls themselves. Instructions basically show how to put the parts together, but don't mention on how to bolt it on to the bike. Considering f I was able to do it (my first bike), I'm sure you would be able to do it as well. It took me maybe an hour of actually taking the original parts off and bolting on the new forward controls. I did "dry-fit" all the components, and preambled the forward controls loosely to a point that it was mostly a swap thing.
If you do go ahead with these, use lots of blue thread locker: this part is bolted on to the frame right next to the engine. C50 is known to vibrate a lot, so you might lose a bolt or two if not doing it this way.
All in all, I had them for 5 (?) month, and I'm quite pleased.
P.S. There is a chrome version as well, but I'm not trusting Chinese made parts to have very good quality chrome, especially where you will be applying some force to the bike with your shoes.