Mr Thierry Legault has a long history of exceptional imaging of the ISS and other orbiting objects, I first discovered his work years ago on http://spaceweather.com/ photo gallery, there you may find from time to time some great captures of the station by some very skilled (and well equipped) amateur astronomers:
http://spaceweathergallery.com/indiv_upload.php?upload_id=134864
http://spaceweathergallery.com/indiv_upload.php?upload_id=134222
http://spaceweathergallery.com/indiv_upload.php?upload_id=133411
http://spaceweathergallery.com/indiv_upload.php?upload_id=132333
http://spaceweathergallery.com/indiv_upload.php?upload_id=130978
http://spaceweathergallery.com/indiv_upload.php?upload_id=130914
http://spaceweathergallery.com/indiv_upload.php?upload_id=127757
http://spaceweathergallery.com/indiv_upload.php?upload_id=127749
http://spaceweathergallery.com/indiv_upload.php?upload_id=126144