Fortunately for you, Quantum will have the numbers for your boat on file for all time, as entered by an experienced sailmaker - but if you ever bought another boat and needed a sail made and the guy you are currently dealing with is working for someone else... good luck to you.
You honestly think that I'll have trouble finding a sailmaker to put together a quality set of string sails in this economy for a 25 footer? There have been 7-800 Merit 25's made. I think any reputable sailmaker can figure it out. Ulman, Q, NS, Doyle, UK, etc. Merits are similar to J24s which gives the designers (not the same as sailmakers/salesmen) a pretty good starting point. The person designing the sail is not working at your local loft.
What 'numbers?' are you talking about? Almost all numbers for boats are online. Given those, any experienced designer can make a sail that will work. From there, it's about R&D and time on the water.
EDIT: The core issue here is that computer-cutting has made sailmakers world-wide... LAZY! They can now churn out very expensive high-speed racing sails for the same high-profile boats every season and make a small fortune out of it without ever having to so much as think about what they're doing... but give them a brand-new, specialist, low-budget, non-racing, low-profile job to do and the vast majority (Quantum and Norths included) simply can't handle it.
And you think they don't lose their shirts on the high end market? You think 3Di sails are made perfect on the first try for a Farr 400? TP52? A V70? Ask any sailmaker if they're getting rich. The top end racers aren't keeping North's doors open. It's the cruising boats, club racers, and mid level guys. Yes, the big ticket items help (main for a TP is around 80k) but they aren't the reason North is the largest sailmaker in the world.