LIMONENE

Does anyone know where to buy it locally?

Amazon is my local store lol (it always has just about everything I want and I never have to drive home pissed cause they are all out of something)

These folks extract and sell food-grade oils and terpenes. I got some eucalyptol from them a couple years ago. I believe they have limonene and many others.
http://www.lebermuth.com/

Lebermuth is a good source.

Also extractconsultant.com for any of the terpenes.