I made it myself, it wasn't too hard and it didn't take too long either. I tried finding something like it too but in the end this was the better option
((Ahh I envy you a lot, I am not skilled with sewing AT all lol I can't even sew a button on a shirt XD I actually found a close enough bag after I sent my comment, and it's pretty close if I do say so myself, but it's not an EXACT replica of the bag. But your cosplay is awesome, did you get that made or did you get it piece by piece?))
Most of it was found at op shops and I adjusted the sizes XD the lab coat was my dads and the tie I made myself. Otherwise it cost me all together sixteen bucks, pretty good if I say so myself
((Ookay. I'm getting it piece by piece too. So far I've spent......a little over 50 bucks on the entire costume, and I still have to get the fabric for the scarf and the dye for the vest. But I'll be doing more cosplaying, it's not just for Halloween for me ^_^ Yea you got off lucky, the only thing I've already had was the vest, but I still have to dye it green.))
Love the whole costume.