Scope for JG APS2 Type96?

I'm trying to sell a good sniper to a great friend. But here's the catch. I already sold the scope that came with it. I've already tried looking for a scope. I bought one for 25 bucks from amazon and ended up shipping it back since it wouldn't fit the sights! It kind of pisses me off that I have to wait a week for a scope that doesn't work. Please someone help me. It looks like this sniper's rail has 20mm width. I'd really appreciate it if anyone found one for me because I can't find one for the life of me and even the ones I'm guessing might work still seem iffy and I don't really want to buy something that I won't get a complete refund on. Thank you!