Hamtronics and they are still in business and do offer a wide range of inexpensive preamps. See http://www.hamtronics.com/lnk.htm.
I have a couple of concerns about those preamps. They are probably fine for portable/HT operation, but they may not be up to a permanent base station application. The first concern would be with weather. If you look at the SSB preamps, you'll see that they are enclosed in a weatherproof case with the connectors facing downward, and are inside of an RF sheilded case inside of that.
Second would be the power handling capabilities. Assuming that you don't have a sequencer, they are going to probably receive your full transmit power and need to be able to switch themselves. I don't see any mention of a safe switching sense power, so they may assume you're using a sequencer.
Third is that the power is being supplied over a non-shielded connection. If the power run is longer than (short?), then you may pick up some noise on it, which is then run straight into the box. The preamps I have use a separate coax line for power since they're shielded and since there's always some crappy RG-58 laying around.
A niggly concern are the BNC connections - Generally, they're used for low power UHF signals, but most quality satellite oriented antennae use N connectors - this will necessitate an adapter, but points to them maybe being more appropriate for portable work.
Just my 0.02.
Regards,
Scott NW2S