Do we know anyone in the village other than Orochimaru who would be interested in researching the Dragonbits?
If we can get Asuma to sign off on a research program etc. then we can just bind Orochimaru to it, or, if we're feeling nice, hand him a small quantity of material while making it clear that he can go through the approved procedure for more.
If he's literally the only interested party then I don't think that we're going to get anyone else interested in backing us up.
I still have absolutely no idea why are we not using Noburi to get Kabuto as a go-between/back channel with Oro. Nobby is still alive and well, surely he can get the job done?