^^Yes, I should have said that. I currently have had my betta in his 10 gallon home for about 3 months and have not yet added the neons although they probably would be fine. The tank has been set up for some time and housed some serpae tetras before the betta moved in.
Chances are you will pay more for your lid than you have done for your tank. If your quite good at DIY then you could make your tank a new lid and add the water proof lighting quite easy really.
I'm running into the same issue. I plan to contact a nice fish store in a neighboring large city in hopes that they can track them down for me. Barring that, I suppose we could order online.