Paul has a lever that's a little overkill for you. It's called the
duplex lever. If you look at the picture, it gives you an excellent idea of the difference between short and long pull levers. It's all in the placement of the pivot point. Longer pivot means more cable pull. The duplex lever will actually actuate both brakes simultaneously. The duplex lever is made for bike polo. So you can ride with one hand and hit the ball (via a long handled mallet) with the other.
Another option would be to get two levers - one short pull and one long pull - such as the Paul Love lever and the Paul Canti lever. These are pricey options, I admit - but stuff like this can often be had for much less than the MSRP if you look in places like eBay.
Good luck with your build.
Corwin