The standalone I like is Vemo Herbs Ecdysterone, an RCE based product. Unfortunately, it looks to be discontinued. Ecdynize by ******** looks to be the next best. Although I haven't used it, Danes has and I know and trust his opinion on the matter. Here again though, it isn't cheap. The $21 asking price is deceptive, because it's only 10mg per tab. In practice, a 200+ pound person is going to need on the order of about 10 caps a day to maximize effects, so it's around $63 for your Ecdy alone. That's before co-ingesting all of the other ingredients I've included in Synthagen, which are critical to maximizing your results.
Synthagen is exclusive to MASS, so that's the only place you can get it. $80 isn't cheap, but it is when you price out all of its other actives. For many on a budget, I recommend using it on training days only. At max dose (15 caps, 5 immediately pre-workout, 5 halfway through and 5 immediately post), it'll last 18 workouts, or a little more than a month for those training 4 days/week.
They also make something called Kre-Anabolyn, which uses the same RCE as Synthagen. More of a bulker, it pairs it with Kre-Alkalyn, 4-hydroxy isoleucine and red velvet bean (mucuna pruriens).
In summary, there are only a few quality ecdy products left on the market. It's a shame E-bol got discontinued, as that was another good one. It wasn't cheap though, as I said the good stuff never will be. It's sourced from Russia/grows in Siberia, and harvested only once a year in August. You may find some ecdy derived Suma still for sale though, and it's worth looking for. You're looking for a 25:1 extract, not the 5:1 stuff (junk, IMO).