I purchased a olmos push button toilet and now can't find fittings for inside the tank. Is there any other brand I can use to help this situation. I have become very frustrated, please help

Depending on how old it is, you may be able to use a newer other brand tank. However, for $200 or less you can get a NEW American Standard, Mansfield, Kohler etc and not have to worry about obsolete toilet parts.

Thanks for your answer, I will be going shopping for the ones you suggested