I agree with Pete - go on eBay and look in the "Collectables Tools & Hardware" section for chisels bearing the inscription "Made in Sheffield, Warranted Cast Steel" or any combination of those words. In my opinion the actual maker isn't important as far as a user is concerned, though some will command higher prices from collectors. To minimise fettling, check for the absence of pitting on the blade backs near the cutting edge. I have never yet found a modern paring chisel the equal of the old ones in any respect - the old blades are thinner, have a great feel and hold a fantastic edge. You might have to pay up to £25 for a really good paring chisel, but plenty of good, shorter, bevel edged chisels for a lot less. Expect to do some work on the blade, but it will reward you with decades of service.