ADF KR 86

I just bought a second hand ADF kr 86 without the sense antenna. Since I would like to install a combined version, instead of the cable sense antenna, has somebody any idea which antenna I could use? Thanks.
Finishing RV7

Antenna

You'll need a KA-42B

If you need a KA-42B, I have one available in working condition. It's part of a KR-86, rack, connector package that I bought but never installed.

I'd be willing to sell the antenna by itself, if you are interested... contact me off list rv-9a 'at' telus.net