Your best bet to contact the artist is to get the name from the famicase page, just below the title of the cart, to the left of the /, and then search for it on google/twitter/pixiv.
If you post the one you need, i can try to help you find it.
Viewing post in Contacting Famicase Artists For Permission
http://famicase.com/16/softs/56.html
I have searched. Also apperantly we are from the same country but the name on the page dont make sense in Turkish. Probably nickname-ish.