dozzga,
The thing about sponsorship is that it is something you get after you've done well at the races as an independent. So it is a bit of a catch-22. You have to prove you can race by actually racing before the sponsors will back you and help pay for you to race. What is your racing record?
There are some indies racing Zero's in the TTXGP and Pike's Peak races that have bought themselves their own Zero's to race with. They get sponsor support from companies other than the manufacturer, and maybe some limited factory support, but I haven't heard of an independent Brammo racer yet.
Usually that's how it works. First you start with buying your own racing bike, and getting local and/or aftermarket sponsors as you do well racing. Then you get picked up by the factories if you prove on the track that you can win.
Right now the factory EV racing teams seem to either hire riders with proven gas motorcycle racing experience, or use their own company to pay for themselves to race. You might have to prove yourself in the gas motorcycle racing world first in order to get enough street creed to carry you over into the EV racing world. Right now the factories seem to want a big gas motorcycle racer name to help try and legitimize their EV racing program. Heck, if you could do well racing on an EV bike as an indie in the gas bike races, you might get some sponsor attention that way too. Brammo seems to be moving in that direction now, so that might be a good route to take.
Good luck, sorry there isn't an easier way to break into the sport.