there are some isotron AM's on ebay. the whole series from the 600 to the 200B $248.00 + modest shipping.
thinking of snagging one with paypal to experiment using part 15.219. the 200 / 200B are about 3 meters tall and the 200 (not B model) covers 1600-1799 kHz, B model covers 1650-1799 kHz.
according to RFB they are decent antenna's for 15.219 when used with TH's, SSTRANS's and other 50 ohm capable 100mW DC input transmitters.
remember you are using all 3 meters in this antenna so the TX must be right at the antenna and the antenna really needs to be ground mounted or elevated mounted using a pvc insulator over metal mast as these ground via their mounts and the FCC won't give you a pass on that one. ground mounted is best though for absolute compliance when at all possible.
i will probably sit on it for a while and one day i will say screw it and just grab one :-)