I purchased a pick guard from Perle a few months ago and put it on a RG550. I recently sold that guitar but took that same pick guard and put it on an RG2550 Prestige. I don't have a picture of the RG2550 yet but it fit. This is a picture of the Perle pick guard that I bought off of eBay on the RG550 Genesis before I sold it. I would think it would also fit an RG3250MZ.
I was in contact with a pickguard manufacturer a couple of years ago and they had options for RG550, RG2550Z etc. Apparently the hole locations may vary by model and the trem cavity width varies based on the trem. Seeing as I only have one Ibanez with a pickguard, I cannot verify this myself.