Speedy: don't be concerned with the vapor over the long term - it takes several hours to evaporate, and once gone there won't be much more % out-gassing left to be concerned with.
I used to make shoes for my three sons when they were quite young and their feet were mushy - it's good for them as they grow. I made one pair or myself and they were so butt ugly I never wore them in public and tossed them out. The kid's looked fine, though, and with practice I was able to make some suitable for public appearances.
Barge is the best of the contact cements. It can be bought from the few shoe findings (supply) stores left in the country.