@donfarr Hi Don, There many different shapes and brands of scalpels. Frankly speaking, surgery type of blades should be very sharp. I assume the #11 blade should be sufficient for this job as it has the longest edge among others. I found some on Amazon (just ordered for myself) but never use this brand before, they are disposable as soon as they get dull.
OdontoMed2011® Box of 100 Pieces Carbon Steel Scalpel Blade STERILE #11 with Free Handle # 3: Amazon.com: Industrial & Scientific
www.amazon.com
Another suggestion is to buy # 11 blades made by Olfa (Japan). They made with high-grade steel, and while also considered disposable, you can sharpen them and they can serve a longer life. But this will require sharpening knowledge and use of sharpening stones. Those blades can fit the most hobby knives.
View attachment 117751
Hope this will help,