Fusion reactor- no I'm serious
Build a Fusor, the whole cost (if you're efficient and good at scrounging) can be from 500-3000 dollars. What self-respecting spec ops bureau doesn't deal with nuclear equipment? It also makes cool glows even if it you can't get the fusion reaction going.
Suggestions for project acronyms include
PARticle Injection System (PARIS)
Large Organ for Hydrogen AcceleratioN (LOHAN)
Link for information
http://www.fusor.net/