Trisha - there are many people every day who discover gliders are not for them. Start looking on Craigslist and Hoobly. Look in the animal classifieds here and make your own post that you are looking for another glider.
You will be amazed how many people are willing to give them up to a good home for little or no charge. The last two gliders I got didnt cost me a penny.
But remember - there is no such thing as a free glider! Both gliders will need vet checks and fecals done. And you will need two cages in order to do proper quarantine time and introductions. You cant just put two gliders together - it has to be done in stages.