I say do it. I have about 4 cases of 750ml bottles that I have been saving to do the exact same thing. Fortunatly a friend of mine has the corker and caging tool. I just need to pick up the corks and cages. I have been working on a FLanders Red and another belgian sour for about 1.5 years now and they will be going into those bottles.
Finding the bottles should be easy, just keep the ones that you drink the beer out of. There are tons of breweries out there now using the brown 750ml bottles.
"Yes, I am a pirate two hundred years too late. The cannons don't thunder there's nothin' to plunder,
I'm an [under] forty victim of fate, Arriving too late, arriving too late."