OK, guys, I have several of the UDM-1604 pieces in commercial projects from 7 to 8 years ago, this is a piece that it has been discontinued and we are not an AMX dealer any longer. I'm looking to replace one system that had lost the audio and I'm wondering what the alternatives are out there for a Distributed video system over UTP for RGB with analog audio or Component video with analog audio.
I was looking into replacing the system with Just Add Power, which it is what we have been using successfully in the latest commercial projects, but the problem is that the displays are Panasonic 9 and 10 Series which at the time didn't bring the HDMI card installed. 
Panasonic makes a single HDMI input card that is compatible with the 9 series and a dual HDMI card that is compatible with the 10 Series and up and we will need to order these boards for all the displays besides the JAP equipment.
The only problem is that the dual boards are currently available, but the single boards for the 9 Series are in back order and shouldn't be available until April according to Panasonic.

Any suggestions?

I am not sure why you are using a Justaddpower product for analog distribution.
Are the pannys in a video wall?

Jason: No analog distribution. My intention is to replace the existing analog system with an HDMI distribution system. The problem is the existing Panasonics don't have the HDMI cards.
I'm looking for alternatives before making a decision. There are a total of 21 displays. Out of the total, there are four 50" that are 9 Series and the rest are 42" 10 series.

I recently needed the single and dual HDMI cards you are looking for.

I was able to get one single HDMI for the 9 series that was drop shipped from Panasonic (maybe I got the last one?).  I actually found the dual HDMI cards for the 10 series on Amazon of all places and was able to order two.

They still show 5 in stock so might be worth a try... don't know how many you need.

[Link: amazon.com]

 

Thanks Paul.
Anything involved in order to make the HDMI boards to work or was just plug and play?

Plug and play on those cards. Just snap them in.

Yup, just four screws and a sticker that comes with it to designate the HDMI port. 

I hope you can get all the cards for the TVs! See if you can find all the service shops for the panasonics and ask if they have any cards from monitors that could not be fixed for a reasonable rate.