I've seen that on some obscure website, not sure if they're legit. You'd be better of buying some dimethocaine and rocking it up yourself imo, it would be cheaper at least I think. I've seen a few posts with people claiming to have rocked it up with mixed results mainly negative.
I've had dimethocaine once and though it was okay, not exactly strong but gave an okay amount of stimulation, enjoyed it at the time not as bad as some people make out! Maybe they got bunk or were expecting a meph or pure coke kind of high! You might want to try nopaine which is ethylphenidate, few places selling it, not sure what it's like though.