[Milsurplus] harris RF-5382 coupler?

[W2HX]

Hi all. I am contemplating acquiring a 125W RF-5020/5032 set up.  I believe
the "standard" coupler for this set up would be RF-382A. I am looking for
something for my truck (1978 toyota landcruiser FJ40) and the RF-382A seems
pretty large. Considering it will handle 400W it may be more than I need.  I
looked around and see another harris unit, RF-5382 which seems to be a 150W
tuner. 

 

Anyone know if these are available on the surplus market? 

Anyone know if it is 100% compatible with the 5020/5032?

 

The other option might be to use an MFJ-993B automatic tuner (300W PEP, 150
AVG) which I already have. It runs off 12V.   

 

73 Eugene W2HX