Need some help finding a knife. My son wants a flipper knife with thumb studs. I’d like it to be a 3 inch blade or under, 2.5-2.75 would be great. It also has to be cheap $20-$40ish, I don’t want to spend a lot in case he loses it and it will be a user. I haven’t been able to find one with these features. I was thinking Kershaw, CRKT or Gerber might have something that would fit the bill, Any suggestions? Also I’d like it to be manual or one I can de-assist.