basic passive preamp

McCormack Micro line Drive?

Adcom GFP-750  Can be passive or active 

You want 10kohm log cheap and good quality, there are many on ebay under $100?
The pick for me though is the 10kohm log Schiit Sys. $49 and if you don’t like it you can send it back.
And if you need more inputs there are many rca input switch boxes on ebay cheap.

Cheers George

http://schiit.com/products/sys

I would look into Tortuga passive preamp. 

http://www.tortugaaudio.com