[Collins] kwm-2 fan and outputs

[yash at aol.com]

 Hi
 I decided to get another KWM-2 after a few years absence from Collins gear.When I had my KWM-2a, I bought a fan kit ,2 small fans that fit with no rework of the rig. I looked now and can't find a darn thing about the kit. Still being made? or a contact, about them? Also have a question about outputs. The new rig will need new outputs...low out and hard to tune. The rig came with a brand new pair of RCA 6146B/8293A ,boxed tubes,but something in the back of my mind says these are not a good version of the 6146 to use in the KWM-2. Right or wrong? if not what is the perfered version for the rig?
thanks for any help on this.
73's
dale wt4t