[NLRS] 23cm ATV Question -- 75 Ohm SMA connection?

[Brad Phelps]

Recently I bought a 1.2Ghz transmitter/receiver ATV bundle as seen here: 
http://www.hamtvstore.com/html/special_offers_.html.

Upon looking at the descriptions a bit closer, I noticed that the antenna 
hookup is a 75 Ohm SMA connection on the transmitter and receiver: 
http://www.hamtvstore.com/html/23cm_atv_transmitter.html.

Originally I wondered if maybe this was a normal thing for  ATV, but it 
looks like ATV transmitters/downconverters made by PC Electronics and MFJ 
use 50 Ohm connections.  ... When I ordered this, I saw that the supplier is 
out of the UK, so I am wondering if 75 Ohm connections are "normal" for ATV 
overseas?

Does anybody know where I can get 1.2Ghz rubber ducks that will work with 
these boards in the US?  I can order them from this same supplier, but it 
took forever for the ATV boards to get here.  I don't want to repeat the 
experience on the antennas if I can avoid it (stupid me for not ordering 
them in the first place.)

More importantly, if I want to use the transmitter with an amp (like the 30W 
one offered by DEMI), what sort of problems am I going to run into?  It 
would also be nice to hook up the receiver to a beam at some point too.

... Probably newbie type questions, but what can I say...  I'm new to this. 
;-)

Thanks in advance for your help.

 - Brad
    AI0BP