E-starter hop up!
Perhaps you could try one of the new MP Jet 25/25-26 motors (geared 5:1) but you'd need a somewhat bigger battery to supply the current it would need to maximize its power.
I haven't tried mine on an 8-cell 950KAN NiMH pack but it might do the trick and allow you the 10-15amp draw the MP Jet needs. Using 8x1250SCR and 8x1700NiMH packs I obtained bench test figures [peak, measured at the start of a series with a newly charged pack] for current draw(A), volts(V), power(W), rpm, and static thrust(oz), as follows:
8x6 APC E:
12.8amps, 9.2V, 118W, [?] , 13.1oz
8.5x5 Aeronaut:
10.3amp, 9.3V, 96W, 7000rpm, 15.8oz
9.5x6 Aeronaut:
14.6amp,9.1V, 133W, 6990rpm, 17.5oz
10x7 Aeronaut:
15.0amp,9.1V, 136W, 5810rpm, 18.0oz
Obviously these are peak (momentary) numbers and you could not expect to maintain them for long, but any of these props on about 8amps (say, 75W) would give you 10 or more ounces of thrust, which should be more than enough to make your E-starter move!
Hope this is some help, Cheers, Phil