RMVXA SCRIPT REQUEST

Well, in my game, Cinericus, I've come to the realization that the characters only find themselves in about four different towns throughout the game (not counting the two where they're being hunted down). So, rather than have to have the player use money to buy weapons and armor, I thought, why not have a system where you can upgrade the currently equipped weapon and armor? Does anyone know of any VX Ace scripts like this (yes, I did look through the script section)?
Here's an example of what would happen:
In the menu, there would be a selection labeled "Upgrade" or something. When you hit that, then select the character who you would want to upgrade, you would be taken to a screen similar to their equip screen. So if the character I picked was Varrun, a Paladin/Defensive Tank, I would select his armor then spend something along the lines of 200g per point of defense added to it, where I could also up thinks like the evasion rating, buffs to stats, etc.
So, any ideas?