Question Please.

Hey guys, please let me know if anyone knows how I should go about contacting a tumblr user who doesn’t have the ‘ask’ option. 

It’s regarding a straight up re-post of one of my fanart (without a permission)  that has been brought to my attention. .

While I’m completely fine with people using my drawings for their likings as long as there is a credit directed to my tumblr blog address,(if the resulting image is big enough)  
I do mind when my drawings get re-posted to another user’s blog simply as an art posting when it could have been re-blogged from the original source. 

Please let me know if anybody has an idea as to how I could contact this user. 

Thank you

**** Thanks for the help guys!! *****
I didn’t want to publicly disclose this user and thanks to your suggestions, I figured out a way around it.