it seems that most exchanges are waiting and in maintenance mode. there is a post somewhere about using steem engine and hive engine to conver the steem. It basically said you need to deposit you steem to steem engine then buy https://hive-engine.com/?p=faq the FAQ on there site explains a little bit about it.
I did find one post that talks about it, I have never read it, found via a google search, and not the original one I did read - https://peakd.com/hive-129017/@libertycrypto27/how-to-convert-steem-to-hive-using-steem-engine -
It may help and like I said it is not the orignal one I read so I have no idea if the process works or not, I guess I will find out on Friday.