I've seen a few online sites that sell pickgards and they will say something like "this gard made need to be altered slightly to fit your specific bass" which means more/less holes, holes placement, pup cutout area, etc. If they don't say, I email them and ask them if it will fit my, in that case, also MIM jazz. They usually reply with a flat no or they just can't say. So if you order like that just be sure you can return for refund.
If you check on Jeannie's Pickguards online, Roger, says that if you send him your old pickgard or I think just a cardboard copy of it, he can build you a pickgard to match, I think that's correct. He has many styles of pickgards in stock that already fit many basses. Now in my case as of yesterday, its a Skyline Joe Osborn 5 I'm looking to order a pickgard for. He has those in stock, just trying to decide what color I want.
To OP call Roger and see what he has to say, maybe he can alter yours or offer some advice. I've talked with him before, he's very helpful.