Yeah sure, if you have a Bitshares account you can purchase them there, or you can purchase them from Steemians directly, just make an agreement with someone, transfer your SBD to them and they'll do a Pocketsend in the comments below.

After which you can choose what to do with them, leave them on your part of the blockchain or transfer them to Bitshares.

Although on Bitshares you do have some costs in transfers etc.

How many would you like?