Oh! I know that feeling but I definitely have two shops I could recommend for a graphic.

http://www.asianfanfics.com/story/view/915246/nolza21-graphics-open-graphic-poster-exo-postershop-graphicshop-bts-got7 (highly recommended - she's done a lot of my latest story posters and I've been satisfied with all of them)
http://www.asianfanfics.com/story/view/967500/k-u-m-a-2-0-revamped-open-and-accepting-requests-graphic-poster-requestshop-graphicshop-reviewshop-posterrequest (I've only gotten reviews done here but their graphics aren't bad either)

This third one says they're open but I haven't seen much activity from them lately so I'm unsure:

http://www.asianfanfics.com/story/view/639206/coup-d-graphics-shop-batch-8-open-graphics-request-shop-open-graphicshop