Help needed alching

Ok i want 99 mage but i dont want to spend 10m getting it and I dont want to spend forever by cutting yew trees and cutting and stringing the bows. So i need a suggestion of an item that i can buy that will give me a loss of 40gp or less when i buy my nats for 223gp ea. So please post and help me. Also when you suggest an item make sure it's easy to buy on low or mid.

 

Green dhide bods, you lose 20 ea last time I heard.