I'm pretty sure that if you ordered a standard "Silhouette" pickguard from a pickguard manufacturer, it wouldn't fit an MM4. Your best bet would be to remove the guard from your guitar and do a tracing of it so that the company you chose can custom make on for you...
OLP is just a name on a headstock... The guitars are churned out of some huge factory in China, and the pickguards are no doubt made by another nearby Chinese factory specifically for these guitars. You won't get any "custom" orders out of them.