Not sure where in Orlando you can get it, but they tend to be in places like Trade Secret and some pharmacies - you will definitely find it somewhere - and definitely in Trade Secret - I should imagine there is definitely one somewhere in Orlando.
The good news is that varnishes are only about $7 which is nearly free! If you can find Jessica varnishes (retail for about £8 in House of Fraser stores here) they are more like $3 - and that is free! Have fun!!