Audio Repair Tools

I have a Spectral DMA 200 that needs to be dismantled and cleaned as it is FILTHY inside. It also has a circuit board connection issue. I have the hex allen wrenches needed to take the screws out, but I don't know where to find electronics tools that are thin/small and versatile enough to properly disassemble and reassemble the internal components. I couldn't find anything on eBay. Does anyone know where audio repair guys and do-it-yourselfers get their tools???