Its a simple cattle implant for christs sake, I dont understand what you are worried about. I just ordered 4 carts thursday and got them this morning. The kits are same thing, nothing in them is illegal, except maybe the syringes which are controlled in some states, but even then you should have a problem.
If your having this much trouble deciding on weather to order fina, I have to ask......do you have your clomid for post cycle? If not, dont bother using the fina until you are prepared.