A Hasbro can be approved for EI (Level 2), and you're correct... not Centurion (Level 3).
I had the same dilemma as you. I wanted pewpewpew, but I wanted Centurion as well. I ended up buying a Hyperfirm to satisfy the Centurion requirements. I've never trooped with it, actually. My Hasbro is lighter and (IMO) much more fun to troop with.
I don't think Hyperfirm produces blasters anymore. Praetorian Blasters seems to be the new go-to for rubber Centurion-qualified weaponry (and since their blasters are all rubber, they are super con-friendly). I had heard great things about them, and they had some e-11 blasters recently available, so I snagged one. Holy cow, it is epic. The Praetorian e-11 is a huge upgrade over my Hyperfirm with regards to detail. It's a little pricey, but you really do get what you pay for. It is gorgeous! (I ended up giving my Hyperfirm to my hubby because he needs one for his upcoming TK.)
You can find more info and pics of Praetorian Blasters here. Send them a PM, and they will hook you up.